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