C++ program check the area of the triangle (POP) (115)

 #include <iostream>

#include <math.h>

using namespace std;

    int main()

    {

    float side1, side2, side3, area, s;

        cout<<" Input the length of 1st side  of the triangle : ";

    cin>>side1;

        cout<<" Input the length of 2nd side  of the triangle : ";

    cin>>side2;

        cout<<" Input the length of 3rd side  of the triangle : ";

    cin>>side3;

s = (side1+side2+side3)/2;

area = sqrt(s*(s-side1)*(s-side2)*(s-side3));

        cout<<" The area of the triangle is : "<< area << endl;

        cout << endl;

        return 0;

    }