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

Show more...

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