10-26 Exercise 3: Find roots of a quadratic equation

0 like 1 dislike
2.4k views

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
[Exercise] Coding (C) - asked in Chapter 5: Selection Statements by (5.2k points)
ID: 28934 - Available when: 2017-10-26 18:00 - Due to: Unlimited
reopened by | 2.4k views
0 0
We will continue this question in few days
commented by (12.1k points)
0 0
Everything is fixed. Enjoy your time with The Judge :)
commented by (12.1k points)
0 0
ANNNNNNNNNNNNNNNNNNNNNNNNNNGRYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
commented by (-249 points)
0 0
Your code has newline at the end sometime. You learned this lesson many times!
commented by (12.1k points)
0 0
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.
commented by (-214 points)
0 0
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
commented by (9.9k points)

56 Answers

0 like 0 dislike 
Hidden content!
#include <stdio.h>
 ** *    *    * 
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 real and **  *  * *     * **
  ****  **    *  * **   ***    * *** *   *   *  *   * * * * *** ****  * = %.2f\nx2 = %.2f",x1,x2);
*  * *  *  ****            * *

   * * ***  **** *  **    *** if(D==0)
 *       *****  * * ****  
***   ******* ** * ** ** ** *   * ** **  * *     ***   *   *  *   * of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
*   *   *  * *  *   **** *   ** ** * * * *   *    * *   * ** * ****     = x2 = %.2f",x1);
   ***********  **   * **  
  ** *** *** ** ** * *  * 
********* *  *  *    **
   *      **  *  ****  *** *    *  *  * * *  ** *  ***  *   *  of %.2fx^2 + %.2fx + %.2f = 0 are complex and  **  ** ** **** ***
*    *  **   ****   * **  ******* * * * *  **  ***    ** **** *  *****  **  = *   * *    * * ***   * ** **
 ** ** *** ***  * ******** * *   **   ***** ** **   * *   *    * = **   * *   **** *** ***  *  * * *  *
 * ***   ** * *  ** *    *
**** *  ****  **** *** * *   ** 0;
}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
**** *  ** *** *    * 
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 %.2f x^2 + %.2f x + %.2f = 0 are real and  * ** ***  * ** * *
* *  * **  * *** * **** * *   * * ******   *   *  * *    * *  ** * = %.2f\nx2 = %.2f",x1,x2);
******  ***  * *** **  *   *

   *  * **   *   ***** *  ** *  * if(D==0)
****** *** *  *  * * ******  
***  ****  * *  **   * * * *****    *  *****    ** * **    *  * ***     of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
  **** ** ** * * * *   *** * * * *   *    ** **   ******** ** * = x2 = %.2f",x1);
 *****  **** ***  ** * ***   *
    ** *** ****    *  ** **  
* * * * *** *****   * **   **
    *  * * ** *      *  **  *   ** ** ***  ** * ****   *** * ***  ****** of %.2fx^2 + %.2fx + %.2f = 0 are complex and     ** ** *  **  *  
*  * * * *** *  ***  * **** ** ******  *  * ***  **  *    *  * * *     * *  =  * * * * **  *     * *  * * 
* **  * ** * *** *   *   *   ** * * * *  *    *  * *    *  *  ** *  * = ***** ** *  * *  ** ** ** * ** 
  ***  * **    *       ** ** 
* *  * * **** *     *** **     0;
}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()

{
  **   * **** *  * ****   ***   a,b,c,x1,x2,D=0;
 ***  *  * ****  *   **   * 
  * *   *    ******* ** **   *   **  * %f ** * ***   **  *** ******  
 ** **  * *  * *      * * *  
*  * *  *    *    *** *   ** * *   
* * ** * ** **    ******* + sqrt(D))/(2*a);
** *** *** ** *  **  * *       - sqrt(D))/(2*a);
** ** *   * *  *  **** *  
**  **  ** **   **  *  **** ** **
 ***** **    **  * *   * 
*  ****  ** * *   *  ** *    * **** * ** ****** *     *** ****  **  ** of %.2fx^2+%.2fx+%.2f=0 are complex and ***  *******  ** **  * * *****   *  *
*   *  **      ***   *   ** *
  *    *     * * ****  ***    **
*  *   *    ** ******     if(D==0)
 ********  **   * * *  *****
 **           ** *** *   * *** ***  **      *           ** *     *  *** of %.2fx^2+%.2fx+%.2f=0 are real and same\nx1=x2=%.2f",a,b,c,x1);
* * *  ***  ** * ****     * *** 
 *  *      ***** * ** *    
 ****** *  *  *** ***  * *** * * 
 **  **     * *****   *
**   ***    **  *  *******  *** * ***     **** **** ***  ** *   ** of %.2fx^2+%.2fx+%.2f=0 are real and        ****        **** *  ****   ** *
 *     *   ** *** *   ***
  * * * * * *****  ***   **  * 
*  ***  *     *** ** *    *
**  **  **   ** ****   **  *  0;
}
answered by (-127 points)
0 0
prog.c: In function 'main':
prog.c:12:14: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
     x1=(-b + sqrt(D))/(2*a);
              ^~~~
prog.c:12:14: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:12:14: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
* ***  * ******   *****
int main()
{
  **** **  *     *  ******* a,b,c,D;
   *   *  *  ** *   **    * *  *  x1,x2,r,i;
*   *   * ****** **    **** *  ** **** *   *   *    ** *      **** ** *
* ** * *** ** * **  *  *** * **        
 * ** ** * ** **     **  ** *  * ** *  *******
 **   *****  *** *  *     ***   ** *  
    * *     *   *   ** ****   ** *     
**  * ***   ** ** ** **
** *  **  **   *   * ** **        ** *** **   *  * ****** *** * *   * of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
      *** *     **  ***** *  *           ** ** *  *     **   = x2 = %.2f",x1);
 **** * *****  * *  * ****
    * **   ***** * * ** ***** if(D>0)
** * *** ** * *  *** * *    *
 *** ***  * ****    ** *****  ****  * ** ****  **    *  ** *****  *  * of %.2fx^2 + %.2fx + %.2f = 0 are complex and ** **** ** ** ** *
 *      *     *** *    **  *  *     *    ***** * *  ** ****   * **   *   * = %.2f\n",x1);
*    **  **  ****   *  *** *  ******   *  **  * *   ** * * **    * * = %.2f",x2);
 * ** ****  ***  * *   *  *   
* **  **** **  ***   ** * * if(D<0)
********       *    * *
  *  *   * * * * ** *** **   ***    *  **     * *   * ****** *  * * ** of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
****   *  *   * * ***  *  ******  ** ****    ** *    -b/(2*a);
    ***   *  * **** **  **  * * ** *   * * ** **        *  *    *
 * * * ** *** * * ***     * ******  * * *** *  *   * *  * * *      = %.2f+%.2fi\n",r,i);
******** **  *     * * ******  *** ** * *   ** *** * *  **   *  * = %.2f-%.2fi",r,i);
   *** ****         *    *  
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:6:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%f%f%f",&a,&b,&c);
     ^~~~~
prog.c:6:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:6:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:12:9: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
         printf("Roots of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
         ^~~~~~
prog.c:12:9: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:12:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:17:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("Roots of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
         ^~~~~~
prog.c:17:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:23:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("Roots of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
         ^~~~~~
prog.c:23:9: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
** *   * *  *   * 
int main()
{
**       * * * * ** *   * **  a,b,c,D;
* * **   ***    * ****      *   x1,x2,r,i;
**  * *   *     **** * **  ****** * **   *    *********   **  **   * 
  **   ***  * ** *   **    ** ** *
 ** *  *    *** ****    ***  * * **  * ***
  * *  * * ** *** ******** * *** *  *  * ** 
 *       *  ** ***   *         * 
**  * *     * **  *  * *** ** 
*** * ** * * *** ** ** ** * ** *  ** *  **** *   * *** *   **  * **   *  **   of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
* **  * * *  * **  *    * *** **      ****** ****  **  ** **  = x2 = %.2f",x1);
*  **  * * * ****  ***** **** 
 *** ****   **  *  ** *  *  ** if(D>0)
 *****    * * * ***** * ****
*    **   **  *  *        ** ***  * * *   *  *** *     * *  **  *         of %.2fx^2 + %.2fx + %.2f = 0 are complex and * * *  *** * ** 
* ** *****  * **   * *  * *  *   ** *** * ** *    **  ** ****    ***  = %.2f\n",x1);
* * * **  * * * ****  **** ******   * * **      * * ***   *    **  ** *  = %.2f",x2);
* * * ***  * ***   ** * *  
*   *  *** ** *  *    ***    if(D<0)
* *      ***    **    *   *  * 
*  * ****** *  **  **  ** * *  *** **    ****  ***     ** *    * of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
   ** * ***   *** *       *** ** * **** * **   **    *  -b/(2*a);
** ** * ** ** **   ** *  **  * ***  **      ** *** *      * 
***          * ** **  **   * **  * * * *       **   *  * ** *   ** * *   = %.2f+%.2fi\n",r,i);
***   **    *    *****  *     ****   ** *  *   **   * * * ***  = %.2f-%.2fi",r,i);
   ****        *  ****  ** *
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:8:12: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
     x1=(-b+sqrt(D))/(2*a);
            ^~~~
prog.c:8:12: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:8:12: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
** ***    *      * * * *   ** a,b,c,d,x1,x2;
*** *** * * *   * **  *  ***  **   * ** ****** *** *  ****   *  *** ** *  * 
 * *** **  *    **          * *
**    ***   **    *  * **** ** *** **
 ** ** **       *  **  ** **  **  **
**  *** ** *  * ****  *   *** *
****  *  * ****  * **  * * *
****   * ** *****  *  * **  ** * *  **  *     ** ***  ** ** *  * **  * ** of %.2fx^2 + %.2fx + %.2f = 0 are real and *** * *  *  **  ** *  
 *** * * *  *   ***       **  ***  *    *** *  ***  * ** *** *    *   * *  = %.2f\n",x1);
*  *  * *** ** *  *  ****** *   * ***      *      * **  * **    ** = %.2f",x2);
 ***** **** *  *   *   *
 *  *  *****  * ****   ** *** if(d==0)
  *    ***   * ***** *** * *
***   *  * *****   * **   *** *      * ****** **   *  *** ****  ****** of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
*    *  ******* *         * ** * *** * * * ******   *  *   *****   ** * = x2 = %.2f",x1);
 *    *    ** *   * *  *  
  **     * **  ** *  **** *   **  
* * ** * *   ** ***   * ****
** ****  *** *    ***    * **     ** ***      ***  *** ***  ***      *  of %.2fx^2 + %.2fx + %.2f = 0 are complex and *   *  * **  **** 
*** ****   * **** **  **  ** *   * **  * ** ** ** ** ** ****   = **    ***  ***  * * *    *  *   ** **
****  ******  *     *  *  *  *****  ***   * **  *** *** *    * = *** * * **  *  ***     * * 
 * *   *  *** * ** **** ***  
   * ** * * **   *  *   ** **    0;
}
answered by (-498 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
* *      * *    * **** ** *  ***  a,b,c,d,x1,x2;
* *  *** *  ** * *   *** **     * * **  * * * ******* ***** *  ** *    
*** * ****  *  * ** * * **       *** *
 *      *  *    **  * * * *  = (-b + sqrt(d))/(2*a);
 * *** ***   ****  **    * * * = (-b - sqrt(d))/(2*a);
    **  *** *    *   *****   * ** **
 **   **   **** *** ** ** ***   **   **  ** * ** ** * ** * * ****    *   * *   of %.2fx^2 + %.2fx + %.2f = 0 are real and different\n",a,b,c);
* ***  ***** * ***  * *  * *  * *     *** *   **  *   * *   **     * *  *   *  *** *      **********  ******** * *** *** ***       * ***   * ***   ***** **   ** ***    * *  **** ** *     ****  * *****  ** **  *  ***  * * = %.2f\n",x1);
 * *  **     * *   **   *   * *  *  *  **  ** ***    *  * * *  *  **   *  * * *** ** ******     ***  ** *** **  * *   *  **  *  *  *  * ** **** ** *** *  * ****** *** * *       ***    *     * **  * *     ** ** **** *  * *    *  * * *** = %.2f",x2);}
 *    **  * * *   *    *** * ** *  **  ** if(d==0)
** *  ***   ** *  ***  ** * *   *** **  *** * * 
   * *   **  * * **** * *     *     *   **   * * ** *   * **  *    ** **  *  *  *  * *  **  *** *  of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
 * **   ** *  ****   *** **  *****   **  * * **  ** * *** ** *  * *** ***     *       * * ***** **  *  * * ***   * *   *** ***  * *** * **   * * * **** *   = x2 = %.2f",x1);}
    * *  ***  *  * **  ***** 
 ** **  *** **     **   **   **  ***  *   ****  *  *** ** *      of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
**  **   * ***  ** **   * ** ***   ** **   ***    ** * *      * ***      = ** ** **    *  **** **  *
*   **  ** **** ** *    *  * *     *    * * * ****  **  * ******  ** =  * ******  ** * * **  * 
 ** **** *  * *     **     * 0;
}
answered by (-108 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include    ***     *  * 
#include *** * **    **  

int main()

{
  *** *  ** *** ** * ** *  * **  ***** *   * **
*** * * *  *  * *     *   *** *   **  %f  *     * *  *   *   **** *   **

***    **    *     * ** * **   ** *
 *    * *   **    ** ***** *** + sqrt(D))/(2*a);
** * * * *    ****  *  ***  * - ** * *  
 * * ***  **  * *     * **  *** *   
**  *   ***** *  *** *** * ******* ** *   *  *   

 * ** * * **   *******    (D==0)
 * ***   *** ** * ***   **   *
   * **  ** *  ** * * **   *  *      *   *  ****        *  * of %.2fx^2 + %.2fx + %.2f = 0 are real and same\nx1 = x2 = * **    ***  * ** * 
    ** ** *    * *******    
  ** * ** *  ** **  **    if (D>0)
 ** * *    *   **  ***     
  * ****  **   * ** * *    *    *** **  **  *  *  * *   ***   ****  *  *   of %.2fx^2 + %.2fx + %.2f = 0 are real and different\nx1 = %.2f\nx2 = * * *** **     * 
**** **     *     *   *  
***  ** ** ******* *    ** 
   *** ** ** *  * *** **
     ** *** *** * ** * **  ** ** * ** ** **   *        ****  *  ***   *  *  of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\nx1 = %.2f+%.2fi\nx2 = ****  * * *** *   ** *  **    **  
**  *    ** *     ***  * ** *

 *  **  *   ** * **        *  * 0;

}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include * ***    ** *** 
#include ** *    * **** * 
int main(void)
{
float a,b,c, D, x1, x2,i;
** * *  * ***  ** *   ****    ** * *   %f  * *   * &a, &b, &c);
**** **     ** *  *  * **    **
  *** ***   *   ** ****   *  (D>0)
 * *** ***   *  ** *****  *
 * * * ***      * * * ** *** **   ** *** * *  * * **** * ***    ** *
**    *  *     * ***  ** * **** *** *** *    * **** ***  ** ******    **

 *   **  * *** **  *   *****  * * *****     *  ****   ** *   **     *  ***     ** of %.2fx^2 + %.2fx + %.2f = 0 are real and    *** = %.2f\nx2 =    ****** *   * ** * 
   * ******   *  *  * **  *  
  ** ** * *  * ***     **** * if (D==0)
* *  * *** ***  *     *      **
  * *     ** **** * *** ** **  *   **** *  *        ***  ** * **
*   ** ****    ** * *  * *   * *** * *  *  * **   ** * **    *    *** * *  of %.2fx^2 + %.2fx + %.2f = 0 are real and same\nx1 = x2 =  **    ****    * 
    *  *  *  **   *****  ** 
*** ***  * **  ***  ****   ***** 
 *** *  * *   * * *  **  **
 ***  * * **  **** ****** ** ** ** *   x1=x2 = -b/(2*a);
*  *      ***  *   * * ** *   * ** *  * * * * * *   *       *  
** *  * *  *** * ***  * **** ******* **   *   ** **** *   *  **** of %.2fx^2 + %.2fx + %.2f = 0 are complex and * ***   ** = *** *  * * = * **  ** ** * ***** **  x2,i);
   **  ** *   ** * ***** *  



 *     **  **  ***  *   * * 0;
}
answered by (-304 points)
edited by
0 0
prog.c: In function 'main':
prog.c:10:16: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
         x1=(-b+sqrt(D))/(2*a);
                ^~~~
prog.c:10:16: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:10:16: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:21:5: error: expected ';' before '{' token
     {
     ^
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include ** *  * ***   * 
#include *    **  * ** *

int main()
{
  * * *  ** * *   * **  ****      * a, b, c, * ****   x1,x2, realPart, **** * * 


  ***** * **** * *    ****** * * *  * ** %lf  *** * ***  ***    &b, &c);


*   * *   *** ***  * * ***  * ******* = b*b-4*a*c;

 ** **   *     **** *   *** *  *   * condition for real and different roots


   *****        ***    ** ****** ** for real and equal roots
**  ****    *   * *  *** **** ***  (determinant == 0)
* *** * **   ** **  * * ** *
      **    * ** *   ***     ****  * * *  **** **** * ** * * **  = x2 = -b/(2*a);
  ** **  *  **   ** * *    ***  ****    **** *  **  *   *  * *** *  of %.2fx^2 + %.2fx + %.2f = 0 are real and ***** **** * a,b,c);
 * * *       **       *  * *  * * * **** *** *    **   **  ***** *  = x2 = ***   * * x1);
 *   *  *  *   *****  * **** ****

   *   ** * *   *   *     ** *   ** if (determinant > 0)
   *** *   *   *   *** * **
**  * ** *     *  *    *     sqrt() function returns square root
  **  ***   ** * ***** *  ****    ** *  * * ***  = **  ****      **  
 * *** * *** * *  * * *** *   *    *** *      = * **  **  * * *    *

** * *** **  * **  *** **** **  *******   *** ** ***    *    *** *  * *  * * *  * of %.2fx^2 + %.2fx + %.2f = 0 are real and    *  ** *** **  *  
*  ***    **   *** *  **    * *  ** * *       **   * *   **   = *  *  *** *   x1);
* **   * *** *** **** *  **  *  **    * *  ** ** *  **    * ** * * *   = *** **  *** x2);
* *  **   *   *****     **  * if roots are not real
 * *** *    ****  * ** *  * * *
   *    ***  ** *** **   * *  
 *    * **  *  **  *  * ******  ** *  *   * ****  *  ** * ** = -b/(2*a);
 * ***  **           * ** ** *  ***    *  ** ***   ******  * **    = **  ***    *** * 
*  ** ***   * ** *  **  ** ***** *** * * **    **** * *** ****  ** of %.2fx^2 + %.2fx + %.2f = 0 are complex and *  *  *    ** a,b,c);
 *** *  * * **    * *  *   *  * * **    * * * *  * ***   ****  =    *****  * *   realPart,     **   *   *
 *** **      ** ***   **  * ****  *     **** ** *  ***  **** *  = *** *  ***  ** realPart,  * ****   **
* * ** ** * **** ****     *

** ** * * *****   * * **** *   0;
}
answered by (-167 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.130.233
©2016-2024

No related questions found

12,783 questions
183,443 answers
172,219 comments
4,824 users