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

Question

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

Comments

We will continue this question in few days

---

Everything is fixed. Enjoy your time with The Judge :)

---

ANNNNNNNNNNNNNNNNNNNNNNNNNNGRYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

---

Your code has newline at the end sometime. You learned this lesson many times!

---

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.

---

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

Answer 1

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);
* *  *   ** *  * * ** **  
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

Answer 2

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);
**  ******      ** ***** **
}

Comments

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'

Answer 3

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;

}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output

Answer 4

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;

}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output

Answer 5

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;
}

Comments

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 6

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;
}

Comments

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'

Answer 7

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;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output

Answer 8

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;
}

Comments

/tmp/ccvUqbC2.o: In function `main':
prog.c:(.text+0x6e): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status

---

-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

---

-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output

Answer 9

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;
}

Comments

/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

---

/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

---

-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

---

-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output

Answer 10

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;
}

Comments

/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

---

/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

---

-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output

---

-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output