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