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

0 like 1 dislike
9.1k 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 | 9.1k 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:172.71.254.2
©2016-2025

No related questions found

12,783 questions
183,442 answers
172,219 comments
4,824 users