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