C Program for Heron's Formula by G Krishna Chauhan

/* C program to find area of trianlge using Heron's formula */

#include<stdio.h>
#include<math.h>
void main()
{
     float a,b,c,s=0,area=0;
     printf("Enter the length of sides of triangle \n");
     scanf("%f %f %f",&a,&b,&c);
     s = (a+b+c)/2.0; /* s is semi-perimeter */
     area = (sqrt)(s*(s-a)*(s-b)*(s-c));
     printf("Area of triangle =\t %f",area);
     getch();
}