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