Find The Area of Triangle if Three Sides are Given::

#include<conio.h>
#include<stdio.h>
#include<iostream.h>
#include<math.h>
void main()
{
 clrscr();

  int a,b,c,s,sum,area;
  cout<<"/n enter the three sides of a triangle  ";
  cin>>a>>b>>c;
  sum=a+b+c;
  s= sum/2;
  area=s*(s-a)*(s-b)*(s-c);
  area=sqrt(area);

  cout<<"the area of triangle is"<<"= "<<area;
       getch();

}