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