Finding area of triangle given its three side

Finding area of triangle given its three side

/*WAP to find the area of a triangle given its three side*/

#include<stdio.h>

#include<conio.h>

#include<math.h>

void main()                                                                 

{

float p,q,r,a,s;

clrscr();

printf("enter the three sides:");

scanf("%f%f%f",&p,&q,&r);

s=(p+q+r)/2.0;

a=sqrt(s*(s-p)*(s-q)*(s-r));

printf("area of the triangle is %.2f",a);

getch();

}

OUTPUT:

enter the three sides:3 4 5

area of the triangle is 6.00