Area of Triangle C++ Program

#include <iostream>
#include<cmath> //to use sqrt function
using namespace std;
int main()
{
int a,b,c; //taking input of the three sides from the user
    cout << "Enter the three sides of the triangle\n";
    cin>>a>>b>>c;
    float s=(float)(a+b+c)/2; //calculating s
    float area=sqrt(s*(s-a)(s-b)(s-c)); //calculating area
    cout<<"Area="<<area; //printing the area
    return 0;

}

Output:

Enter the three sides of the triangle:
5 10 12
Area = 24.5446