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