10-26 Exercise 3: Find roots of a quadratic equation

0 like 1 dislike
17k views

Write a program to find roots of a quadratic equation

A quadratic equation is a second order equation having a single variable. Any quadratic equation can be represented as where a, b and c are constants ( a can't be 0) and x is unknown variable. 

寫一個找二次方程的求根程式

For Example

 is a quadratic equation where a, b and c are 2, 5 and 3 respectively.

To calculate the roots of quadratic equation we can use below formula. There are two solutions of a quadratic equation.

使用下列公式:

x = (-b + sqrt(D))/(2*a)
x = (-b - sqrt(D))/(2*a)

where, D = (b*b-4*a*c) is Discriminant (判別式), which differentiate the nature of the roots of quadratic equation.

For the complex result (複數根):

realPart = -b/(2*a);
imaginaryPart =sqrt(-D)/(2*a);

Note: We have used sqrt() function to find square root which is in math.h library.

 

Example input 1:

1 2 1

Example output 1:

Roots of 1.00x^2 + 2.00x + 1.00 = 0 are real and same
x1 = x2 = -1.00

 

Example input 2:

1 -3 2

Example output 2:

Roots of 1.00x^2 + -3.00x + 2.00 = 0 are real and different
x1 = 2.00
x2 = 1.00

 

Example input 3:

1 2 2

Example output 3:

Roots of 1.00x^2 + 2.00x + 2.00 = 0 are complex and different
x1 = -1.00+1.00i
x2 = -1.00-1.00i
[Exercise] Coding (C) - asked in Chapter 5: Selection Statements by (5.2k points)
ID: 28934 - Available when: 2017-10-26 18:00 - Due to: Unlimited
reopened by | 17k views
0 0
We will continue this question in few days
commented by (12.1k points)
0 0
Everything is fixed. Enjoy your time with The Judge :)
commented by (12.1k points)
0 0
ANNNNNNNNNNNNNNNNNNNNNNNNNNGRYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
commented by (-249 points)
0 0
Your code has newline at the end sometime. You learned this lesson many times!
commented by (12.1k points)
0 0
After i correct the newline in my code,there is still wrong output.However,I had run the program in Codeblocks.The output is still as well as the result. Seeking for help.
commented by (-214 points)
0 0
your output lack of 1 space at line 8 when print out "Roots of ...". Please be careful with all small details when working with online judge
commented by (9.9k points)

56 Answers

0 like 0 dislike 
Hidden content!
  *****  **   *  
  * *    ** ** ****
int main()
{
**  *   ****    ****   * **    a,b,c,D = 0,x1 = 0,x2 = 0,Real = 0,imaginary = 0;
*    *** ** **  ***   **     ** ** *****   *   * ** *** ** *** *

**** * **  ** *******   ***** **    * * ******** of %.2fx^2 + %.2fx +%.2f = 0 are",a,b,c);
******** **      ***   ** * **  = (b*b-4*a*c);
 * **   ***      *******   = (-b + sqrt(D))/(2*a);
 *   ** *  **   *  * *  ** = (-b - sqrt(D))/(2*a);
**   *    **** *  *  **    ** * (D < 0)
  ** ***    ** ***   ** * * **  
* * * **  * ***** * *  ***********       complex and *** *     **  *  **
 ****     ***** **    *  ***** *   *   * = ***  *   ***  *   ****** *  
    **     *** *****    *   **   **  * =   **  ** ** ** * **   **   *****
  * *  ** * ** *** *    * 
** ***** * ****  ***   ****** (D > 0)
** ****  **** ** * ***  * *  
   ****     *** * ***  ***  *    real and ***   ******* ***** 
***   *  ** * * *  **   **  *  **   = * ******  * * 
** *** * * **   * *    *   ** * * * *   ** *  = %.2f",x2);
   *  * *** ** ****  ** ** **
***   **   ****      * **      (D == 0)
*  *  **     ***  *  *****      
* * **** *  ***     * * ****   * *   real and same\r\n");
* *       * **   ***  ******* ** *   * *** = x2 = %.2f",x1);
* *****  * **      * * *** * 
}
answered by (-214 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*    ******* *****
int main(void)
{
***  *   * **  **   *  **  ****    a,b,c,D = 0,x1 = 0,x2 = 0,Real = 0,imaginary = 0;
*   *** * * **  ** **   **    **   *   *  *  ** *  ** *  * *** *   * *    *

** ******   ***  ******* *   * ** **** of %.2fx^2 + %.2fx +%.2f = 0   *  * * **
   *  **  ** * * * ** * ** * * = (b*b-4*a*c);
* ** **** **** * * * * * ** = (-b + sqrt(D))/(2*a);
** **  ****   *  *  **** = (-b - sqrt(D))/(2*a);
 *** *  * * ** **   * **  *** ** = -b/(2*a);
 *****  *  *         ***  *** * *  * = sqrt(-D)/(2*a);
**  * *         *   ** *  *** (D < 0)
*   * * **    ** ** *  
* * * **    *  ****     **   *   *    complex and ***  ******  * ***
*  ***  ** *** *  * ** *   * **  * *  **  * =  *****    ** ***  *  * ** * 
  *  **  **  *  *  **** ** **** *   *** * = *****  * *  *     ******
      *  ** * **  ** ** *    *
*  *  ******   ***** * *  *  (D > 0)
 *  *****      ****  **        
    *   **** *****  ** ***   ** *      **  real and    ******     **** *
** **  ** * ***** ***** * * * **** *  *    * ** = *  * **** ** *  
       *       *  * ******** *   *      ** = %.2f",x2);
   * *       *** * **  * * **  **
  * *   **** * * ** *  (D == 0)
*****    ** *  **   * **  *  
 ** * * *   *   ** ***      ** ** *    ** * real and same\r\n");
  ** ****  **** * *****    *** * ** *   = x2 = %.2f",x1);
** **** * **   ****** * *
}
answered by (-214 points)
0 0
prog.c: In function 'main':
prog.c:9:16: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
     x1 = (-b + sqrt(D))/(2*a);
                ^~~~
prog.c:9:16: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:9:16: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
** **** ** *** ** *
#  ** * **  ** *  *  ****
int main()
{

* *   * *    *****    *   ** ** ** ** *    **  **** *  ****
* * **   *    ****  *****  ***   ** %f * *   *     * ** ***     * * * **
* *  ** ***** * *   * ** ** ** = (b*b-4*a*c);
   * *** *  ***  *   * * = (-b + sqrt(D))/(2*a);
  * *   *    **  **   *    *   = (-b - sqrt(D))/(2*a);
**  ****** *   *** * * *  ** ***  * **  
 **   ***  *    *  *** ** *  *
**  ** *  * * **** ******    *  **   **   *   * *****  * * *  = -b/(2*a);
       ***  ** **** ** *  ***    **  * *   * ******* *   *   * *  =sqrt(-D)/(2*a);
** *** * * * * ** *    * * ******  * ** ** * ** **   **   * ****  *   of %.2fx^2 + %.2fx + %.2f = 0 are complex and  *  * * ***    * *  
**** * ** * * *  * ** * *  *  *   ** ***   ******* ****   **   * = %.2f+%.2fi\n", realPart,imaginaryPart);
** ** **    ****  ** ** ********** * **  ***** *** **       **  *  = %.2f+%.2fi",   ** *******   
  *         * ******    * **  ***
* ****** * * **** ** *  * * if(D == 0)
 ***    **** * ** * * **   

 ** **  *** * *  * * ******* **     *   *  * ** ********  *   ****** ****  of %.2fx^2 + %.2fx + %.2f = 0 are real and ***  ** **  * * *
 * ***  ***  *** ***** * *  **** *      **  * *** ***     *  ** *** *** ** = x2 = %.2f", x1);
* ** *  ***  ****** *   * * 
 **** *   **  ** *   ** ** 
  *   *** * *** **  *  ** ***  
* * *******   ***   *  * *  ********  *    ****    *  *  **** **  *  of %.2fx^2 + %.2fx + %.2f = 0 are real and **   ** * * ** * *  
***    * *    * *  * * * * *** *    ***  *** * *** **  *  * * **   = %.2f\n", x1);
*      ***** ******  * *    * ****  *    *  **   **  **  ** *  *  ** ** = %.2f", x2);
 ***    * ***  ****  * * **
 *  *   * **    *  * ** *     * *  0;

}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
**** *  ***  ****  *
#     ** * * **   ***
int main()
{

** ***   *    ** **    * **   *  ***   * **   *  ** * * 
**     *  * *  **   *     ** *   * **    * * %f  ** *    *  * *  * * **    *  
*** **       *** ** *  ** * = (b*b-4*a*c);
   **   *    ** *  *** **  = (-b + sqrt(D))/(2*a);
 * **  *    * ** *****  **** *  = (-b - sqrt(D))/(2*a);
**** *   * **** ** *      **  **   **    
  *   * ***  * **     ** *
      *    * * **  *   *  ** *** *****  ** * **    ** *    = -b/(2*a);
***   * ****     * *** **  * **  * *  **    * * *  ** * *  =sqrt(-D)/(2*a);
*** ***    ** **            *** *  *   *  ***** *  ***  * * * ** ** *  * ** of %.2fx^2 + %.2fx + %.2f = 0 are complex and ** ** **** *   *  
**  ** ** *  *  *** * * *  ***  **  ****  **  *** *  ** * * **    ** = -%.2f+%.2fi\n", realPart,imaginaryPart);
*****  ** *      **   **  * *****   *    *** **     **    ** *  *    * = -%.2f+%.2fi", ** ********   **** 
*   **** **   ** *** **  **  
 * *** *   *****   *  **     if(D == 0)
***** ** * * * ** ***

 *** ** ** *  **   **  ****      * **  * * ** **  * **     of %.2fx^2 + %.2fx + %.2f = 0 are real and    ****** ****** *
** * * * **    *** * *     *  **   *     ****   **   ***    ***  ******  = x2 = %.2f", x1);
***  * *  * ***   * *  ***  *
**  * ** *** **** ** ****     
 **  ****    **** ** * ** *****
   * **   **  *  * **  *  ****   * ***   **** ***** *     *  * of %.2fx^2 + %.2fx + %.2f = 0 are real and    ** *    **  * *  * 
* * ***   **  * *      ** **  **  *      ***   ********** *  *  *  = %.2f\n", x1);
*****   ***   * * *   ***** ** *   ** ***    * ** *    *   * * *   *   ** = %.2f", x2);
 *    ***   **  **  *  *  **
* **  *** * ** ***  ** ** *** *  0;

}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main(void)
{
 *   *    **** **  ** ** **  * **  a, b, c, D, spD, x1, x2;
    
  ** * * **  *** *** ***** *     *  **  *  *    %lf %lf", &a, &b ,&c)==3)
    {
* * ** * * ** ** *   *   ** ****    ********   **  **  * ***  - (4*a*c);
 ********** **  ***  **** ** **  **  * ****** **** **
 *** ******** * * ***  * ***  *   *** ***     *  * ** ***  *  * 
      * *  *  ** *  ***     *  *    ****  * ** *  ** *
***     **** *  *      ** **  * *** **   *  *** * *  ***   *  ** * * *   ***  ***  
* *   ****  *** * **** **  ********  *  * **  *   ***  **  *  *** *** * * ** **   (-b+spD)/(2*a);
  * ** ** ***   * ** * **   *   *** ******  *   *** *  ** *   * ** **   **      *   * (-b-spD)/(2*a);
***  * **  **  ** **** * * * *** ***** * *****   **     * ****   ***  * * * * **    *  (x1==x2){
 * **  * ****        **    **** * * * * *   *    *         *  *  **  * ****  ***  *  *    **** *  * *  *   **       of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
 * *    *  ******** ** **     ***  *     * *  ***      **  ****   ***    **** * *  *   *  
** ** **  *** ********* *   * *    * *  *** * * * *     **  * **    *** * ****  ** {
  * *** ** **   *   * * * ****** * * *    ** * * **** ** *  *  * * *    * ***   *      ****      * ** ***  ****  **  ***  *****  *** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf",a,b,c,x1,x2);
*  * *     ****  ****** * * *   * * * ** **    *******   *    ** *   *   
 * ****    *** ** *  * *   *      *    ****     ** ****
  * *     ** * ***    **** *** ****  *** **  * * * if(D==0)
** *   * ** **  ***   * * ******** * *  ***  ** ***  **
**  *   * ** ** *  ***   ** ***  ** *  * ***  ** * **   *   ***     **  *    *  **   (-b)/(2*a);
*** *   *****  *  *** *** *****  ** ***  **  ** *** * **   * *  *   *   **
    * *  *****    * *  * ******   * ** **  **  * *** ****    *   * * **  *****  * 
  *** *** *     *   ** ** * ** *    *  **  ***       *** *   *  * **   *       *   *   **   *** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
*   **   **** * **   **  *  ***   ***    ****** ***  **** * ** ** * * *  *   **  * ** *   *
  * ****** *    * **** ** * *********    ** * ** **  *  *     *  * * * 
 ** **        *  **    ** *** * *** * *  ** ****** * * ** ****    * * **  * 
* *** **    **  *  * * ** *  *    *    *   * *  ** *  **  * **    * *   ***     *   
 * ** *  ****   ** ** * * * **  * **** *   **     *   **  ** * **     **** ***  **    **  ****     of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
   * **    * *** **    **    ** *** ***** **      * *** **** ***  *   *    
 ** *** * *     *   * **** ** *   **** ** *** *    ****
*   **     ********         *  * * **   **    *** * if(D<0)
*    *  *** *** ***** *** * * *** *  ****** ***  *     
   **  * ****** *  ** *****  *  **** * ****  **     ** ** *  ***  *** * ** *  * * (-b)/(2*a);
*     *  * *  * * **  ** * *     ****   ***   * ***  *** *** * *****             -x1;
** *** *   * **   * ****   ** * *   * *** * * ** *  *** ***  ***  * * *** * * *   **    *   of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
  **  *   **** * *   *** **** * *  *    **   **  * ** *
* * **  *      * ** **** *
    
* ****   **  **** ***      *    *** ******   ****
   *   * * *   **** *   *  *  ***    0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdlib.h>
#include<math.h>

int main(void)
{
**** **    * * * *            *   a, b, c, D, spD, x1, x2;
    
 *    * **    *    * *** ** ***    * * ** %lf %lf", &a, &b ,&c)==3)
    {
 *   ** *   ******   * *  * ** *  *  **   * * * *    **    - (4*a*c);
*   ** *  ** * *    *****  *  *   **     **  * **
 *  ** * *** ***  *  ***     *  **   **  *      ******   *    ***
  * * *     *   ****   * *** **  *  * ** * *** 
 ***       **    **  ** ****  * *    ***   **  **  * *   **  ** ****  * * * ** *  *** 
  ** * * *** **    ***  *** ** ***  *   * * * ** **     *     *   *  ** *    *** ** ** (-b+spD)/(2*a);
  * *  * * ** * ******      * ** * ****  * * * * ****** *    *** * * **   ** *  **  **    (-b-spD)/(2*a);
* *    **         *  ***  * **  ** * *  * ***** *     * **  *   ** **    *** (x1==x2){
 *** * ***  * *  * *  **  ** ** *  ***  * *****   ** **  * **  **     *  ** ******* *  * * *  *  * * **   *  *  ** **   ** *     * **** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
 *  * *    ** * **  ***  *    **** * * * ****  * ***   *    **    * * * **  ***** *  *
 *  ** * **    * *  * ***   *  *** * *   **  * **   **   *      ** *       ** *** *  {
    * * **    ** *  *     *    **  * * **  ****    ** ****   ** ** * ***** * *  **** *** ** * ** * ** *   * *** * *   * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf",a,b,c,x1,x2);
* ***    * * * **  * **   * ***   *  *  *    *** * * *  *** ***  * * **   
*  ****  *  *    ** ***  ** *  **  ******   ***  * 
*****  * **     **     ******* * **    *   *    *   * * ** if(D==0)
  *  **  *    * **  *    ****   **   ** *** * * **   **
     ***    * **** *** * * * *         *    **  * *    * * ** * ****      * **** * *  ** (-b)/(2*a);
 * * **  *    *        ***  *** ***     *  *    * **  **** ****    *  *** **    *     *  
  *  ****   *   ***  **  *       *  * * * *     * * ** ****  * **    *  ** **   
 ** **   * * * *    * * ***  **       * *  * ***** *    ******  ** *   * ********  ** * *** * * *   * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
**  ** *** * ***  * *  ** ******* ****  ****** ***** ** *  **  *  **  ** *   
****    ** ** *  **   * * *   ****   * * * * * *    *    * *   *   *******  
*** *** ******  ** *  *    * * **** *  * ** * ****** * *  **** * **** *  **** *** *
 **    ** ***** **    ***   *  * * ** *   *       ** * *    ****  *     *** ** ****
**     **  *  * **** * *  **  * * * * *** *** ** ****    **   * *  * ** ************ *   **  *     of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
 ** ****  ****     ***   * *** *   **  ** * ** * ** **     ***  **  ***  **  
 * ** **** **** * *  *   * * ** ** ******  * **** 
*******  **  *      *    *   **    * * *  *   *** *  * * if(D<0)
***     ***    *  * ***   * *** ** *    * * * ***        *     
**   ******** ** ** * *** ** * *   *      *    **    *********   *   **   (-b)/(2*a);
*  ******* * * *  * *     *** *     *  **** ** **** *  ****    ** **     *   * * * -x1;
  *** * **** ***     *  **** * ** * *** *  * **** * * **  * * *   *  **** *  *      ** *** * of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
*** * *  **     * *    *** * *  *    *** **  * ****  *  ** ***
 ***  *** **** ****** ** 
    
 * **  *   * ** **   * * *  *** * *** * *** 
 ***   *  **** *  **   *  ********  0;
}
answered by (-249 points)
0 0
prog.c: In function 'main':
prog.c:8:11: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     while(scanf("%lf %lf %lf", &a, &b ,&c)==3)
           ^~~~~
prog.c:8:11: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:11: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:18:17: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
                 printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
                 ^~~~~~
prog.c:18:17: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:18:17: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:17: warning: incompatible implicit declaration of built-in function 'printf'
                 printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf",a,b,c,x1,x2);
                 ^~~~~~
prog.c:21:17: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:29:13: warning: incompatible implicit declaration of built-in function 'printf'
             printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
             ^~~~~~
prog.c:29:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:34:13: warning: incompatible implicit declaration of built-in function 'printf'
             printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
             ^~~~~~
prog.c:34:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:41:13: warning: incompatible implicit declaration of built-in function 'printf'
             printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
             ^~~~~~
prog.c:41:13: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main(void)
{
 ** * *   ***  ** *****  * ** a, b, c, D, spD, x1, x2;
    
* ******  * **    **  * **  *   *   * ****  *  %lf %lf", &a, &b ,&c)==3)
    {
 ** *   * *    ***  * ****      ** * ** ** *  *   **  *       - (4*a*c);
* **  ** *   ** **  *****   * *   ****     *** **  ** *
      *     *    * *    ***** *** *****  *  **** * ***  * *    * *  
* * **     * **  **   *         ** ** *** * ** **** * 
   * * * *** * ** **** **   *** **    *  * ** ***    * * ** * *    **  * * **  ** ** * *
** *   **   ** *  ** ** *     **  ** * ***   * **** ** ******** *  * **** * * **** * (-b+spD)/(2*a);
****      ** *  ** * * *     *      ********  * *   *   ** **       ** *   *** (-b-spD)/(2*a);
* *** * *    ** *     * *** *    *    * **  *  **   *  ** * **** ***     *  * *  **  (x1==x2){
**    * * * *    *  ** **      *  *  * **    * ** * *  *  ***  * ** ***   ** ***** *  *****    **      *  *  * **  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf\n",a,b,c,x1);
*   ** * ****   ** **    * *** *  *** **    *** * *  ***  ********* * ** * *    * 
 * *  *  *     *  *  ** * ** *  * ** *  ** ***** *   **     ***   * *  ****   * ** {
 *** * *** * ** *  *   **   ***     ***      **     **  * *   *  ** *** *  * **** *   *  *** **     ***  *****  ** **  ***   of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf\n",a,b,c,x1,x2);
***   * *  **   **        *   * ** * ** *    **  * ***   * *  * **  * ******* *   
** * ** * ***** * **   *   ***  * *          * ******  * * 
 ** * * * *   * * * *  *    *   * * *      * * ** ** if(D==0)
**     *  * * **  * *  * *** ** ***    **** ** **     * * **
* ** * * **      * *    ***   **     **       *********** * *****    *   ** **  **** (-b)/(2*a);
 * *  ** ********* ****   * *  *  *  ** *  *    *   *    *****  *       **** * *   *
* *  *   * ***** ****  **  *   **   * ** **  *  ** **    * *  *** *** ****   
          **      * *** *** *   *  *  **  ** **    ****  *   *     * ** *  *  * ** * **  **** * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf\n",a,b,c,x1);
     **   *  ***     *  **  * * ** ***** *** *  **  **  *  ***  * ***  * *** * * 
   * * *  **  *  * ***** ***  **  ** * *  ****** *   ***   *** *   **  * **    
*  **** * *** * *  *     **  ***  *   *    **  * ** ** **** ***  **  ** **  * *  **** 
 * * * *  *           *** **  *  *  ***   **    * **** ** *******  ******  
****   ******       * ** *******  ****** *    *  * * * *     *    **** * *  * * * **   * *   * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf\n",a,b,c,x1);
 ** *     **  *   ** *** *  *  **    **  ** ****    ****    ****   *   * ***     *
  **** **** **  *   * * *  ****   ***  *   *   *****  *
  ***********  ****** **  *  *   *    * **  *     *** *** * * if(D<0)
*            **         * **    ****   **           **     
  ** *  **** * **** *  ** * *  * *  * *   **   ****      ****   **  * **** *  * **** * **   (-b)/(2*a);
******     **    * *  **  *******  *  ****    *   *  *  * ****  ** *   ** ** -x1;
 * * *** ***   * *   **   *    *  **** * ********* * * *    *   ****  ** **       ***  *  **     ** of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
    *  ***   *   ** *     *** ** **  *    **  *  
*     *  *****  * *   *** 
    
 ** *   *  **** * **   ***   * **  ***  *  * * ****
***** ***   **  * ** *   * *** *  0;
}
answered by (-249 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
* *   * *  * * ** 
  **** ** * *   *** 
   * *  ***** ********
int   * ** 
*  * ***  * *    * ****   * *** ** a, b, c, D, spD, x1, x2;
** *   *** * *****  ** *  *
 *** *** * * ***  **     * **  ***  * %lf **** *   *****   &b  *  *  
* * *   {
  *****    **** ****  * **    ***** * ******* **   *  ***   *** ** - (4*a*c);
 *   *****   *  **** * *** ** ** *  **   **** *  **   * *
   *  **         ** *** 
 ****** *       {
 *  *** ** **  ** * ** ***  ** ***   ***** * * ****  * * *   **   * 
*  *  ** * ** *  *       **  *** ** ***  * **** ** * ********      x1=   *  **  
***  *    *  * * *       *** *   ** *  *** *  *   * *  * *  ****    x2= *  * **** 
**** ** **  * * * **    **    **   *  **** * * * ***  *  *  ** *   ***   if (x1==x2){
** ** **   *  * ** ***  **  ***  ****  **      **  ** ****            ***   *  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = * ***** *** ** 
* *** * ** * * **  **********    *** ** *  ****         * *     ** ** ** **  * 
 * *            *    * * *** ** * ****  * ** *  * ****** ** ***   else {
* ***** *   *   **  * **   * *  * ** * ***  *    *  ****  * ** **  ****** *  ***   *     *****   * **   of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and   **   ** = %.2lf\nx2 = ****  * * * **  * ** 
***** ** * ** *  *    ** **  * ** **  *  *  *** ***** **** * ***  *  *    }
*************     *** **  **    * ***  *  *    *  *       
 ***** ***   *   *      *    **   ** *      **  **   ****  * if(D==0)
** ** ** ** * *  **  ***     {
  ****  *  *** *** * *** ****  *** ***   *  **** *   *  * ** * **   **  **  *  *  * * * **
*    ***  **** * * ****   ****** *  *      ****     *  ****** ***  **    *   ** * 
    ***    * *         {
 *   *  * *   **     *  *****     **     ** **   * ** **  * **  *   **    * *  *  ** *    * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 =    * *    *  * *  * 
 **      * * * * ******* ********** **   *  ** *   *  ** *  ***  **  *  * **     ** *
****  *  *     ** * **   *    *  **  ******* ****   *****  ** **** *  *   *    
  ** **  ***      ** *** ***   * ** **  *  ** ***  *  **** *** * * *     *   * *
* ** **           {
* *   ****  ****  * *** * * ** * ****   *      * *  ** ***    ******  * **  *  *   **   *   **   **  *  * *  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = **     ** *  * *  * 
  ****  **  * * **   *    *  ****   ***** **  ** **** **     ***    **  * **  **
*   * ****   *     *** ***   *** ** * * **  **  ****** *
 *  **** * * **  * *    *  **  **** **  * * ****  **  * ** *   *  * *
***   **           ** *   
            x1=    * *
* * *          **  * ***       *  x2= -x1;
  ***   *  *  *****   **  ** ***** *** *   * * ** ****  ***   **  ** **    *      * * * ** of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and *      * * =       *      =  *     * **     * * ***  
 ** ***   ** *    **** **  * *   ** *  ********     * * 
 *****  **** ****  *    *  * 
******* * *     *  **** ** ** *
   *********  **** * ***  * **      ***  *      
  * *  **  *  *  *  ***********   0;
}
answered by (-249 points)
0 0
/tmp/ccvUqbC2.o: In function `main':
prog.c:(.text+0x6e): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
* * *  * * *****   * **
**    *  *  **   * ** 
int main(){
 *** ** *  *  **  **  ** * *  a,b,c;
** *  **  ***** ***    * *** *   * D;
  *** * **    *** *     ***   **** * * *  %lf  ** *  *    * ** *  * *   *     ** 
 **   *  *  ** ***    ** *** **   - 4*a*c ;

**    * * *** * *  *     ***   * ** * of %.2fx^2 + %.2fx + %.2f = 0 *** * * ** 

*** ****  **** *    * **  *** *  
*   *** *   *   **  * * * **   ***   ** **  ****** ****   *    ***      complex and *  * *** ****  **** 
 ***** * *     **   *** *** * *  *  * *     ** **   * *  *   *** *    = * **      ** **  (-b) / (2*a) ), sqrt(-D) / (2*a) );
*   *    * ** **   * **** **** *    ***    * * * *  ** * ** ***   * **  = *****  * **** * (-b) / (2*a) ), sqrt(-D) / (2*a) );
* ** **** *  *** * * *    * * 
*  * **  ** **   ***  * if(D==0){
*  *   *** * ***** ***** **  **  * *   **** ** *  * * ***      **    ** * real and same\n");
   ******   **   *   *  *** **    ** ***** **** *** * ********   = x2 = %.2f",( (-b) / (2*a) ) );
 * * ********  * *********  * 
*** * *  * ** **   ** *  ***  * * **   
*  * * *  * *  **     *******  *  * ** *   *    * **  ** **** **   *** real and *** **  *  *  *  *  
* **  *  * *  *** ***  *   ******* *   *** *  * *    * * * * ** = %.2f\n",( ((-b) + sqrt(D)) / (2*a) ) );
**    * * **** *   * **   *****   * *** *** **  * **** *** *** = %.2f", ( ((-b) - sqrt(D)) / (2*a) ) );
 ** ****** ***  ***  * *   * **  *

*** ******  * *  **  ** *** **  * ** 0;
}
answered by (-116 points)
0 0
/tmp/cc8OPUJA.o: In function `main':
prog.c:(.text+0x51): undefined reference to `pow'
prog.c:(.text+0xdd): undefined reference to `sqrt'
prog.c:(.text+0x13f): undefined reference to `sqrt'
prog.c:(.text+0x213): undefined reference to `sqrt'
prog.c:(.text+0x26a): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
/tmp/ccLeUfQ5.o: In function `main':
prog.c:(.text+0x51): undefined reference to `pow'
prog.c:(.text+0xdd): undefined reference to `sqrt'
prog.c:(.text+0x13f): undefined reference to `sqrt'
prog.c:(.text+0x213): undefined reference to `sqrt'
prog.c:(.text+0x26a): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include ****  **  *****
#include <math.h>
int main()
{
**  * ** * ** *  *   *****   **  a,b,c,x,y,d;
*** ** ** *  **  * * * ** *** * *** *** **   %f **     *** * **   *   *  *  * 
  *  * * ****  ********   ***   **
* ***   ***     *   ***  * *****   *  
** *** *    ***  *     * * ** **** *  * * *** 
**  ** *     ******  (d>0){
*****  *  * *  *  ***      *   * **    **** of %.2fx^2 + %.2fx + %.2f = 0 are real and * * *   *      * * * *
 **    ** * *  **  **  *   ***        * = %.2f\nx2 = %.2f",x,y);
* *  * ** ** *  ****** ** 
* * *****   **     *  * *   if (d==0){
**  ***  *  *     * ******* *  *  * ***   of %.2fx^2 + %.2fx + %.2f = 0 are real and * **    ****   ** 
*   * ***  *     **   *    * *    *   *    = x2 = %.2f",x);
 * *****   * * **** ****** *  
* ******* *  ******   *    ****  
*  *  ** ***  *   * * *   ***** * 
   *** **** **  * *** *       **  ***    of %.2fx^2 + %.2fx + %.2f = 0 are complex and  **** *   ** *   **
 *  ***  * ** * * * ***  **  * * 
  *     ** * * ** **   * ****  *****  **  =  * *** * **       
*  ** * *** **  * **   *****    ** * *   = * *  ** * * * * 
**   ** *** *   *   ***  ** *

** **   *   *  **     * ****** * 0;
}
answered by (54 points)
1 0
/tmp/ccheVQNV.o: In function `main':
prog.c:(.text+0x87): undefined reference to `sqrt'
prog.c:(.text+0xd5): undefined reference to `sqrt'
prog.c:(.text+0x21f): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
/tmp/ccJPGNPl.o: In function `main':
prog.c:(.text+0x87): undefined reference to `sqrt'
prog.c:(.text+0xd5): undefined reference to `sqrt'
prog.c:(.text+0x21f): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:162.159.115.31
©2016-2026

No related questions found

12,783 questions
183,442 answers
172,219 comments
4,824 users