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