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