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