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

0 like 1 dislike
7.9k 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 | 7.9k 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:172.70.178.131
©2016-2025

No related questions found

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