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

0 like 1 dislike
12.3k 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 | 12.3k 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:172.70.80.170
©2016-2025

No related questions found

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