TriagnleArea

#include <iostream>
#include <cmath>

double triangleArea (double a, double b, double c)
{
    if (a+b>c && a+c>b && b+c>a)
    {
        double s=(a+b+c)/2;
        return std::sqrt(s*(s-a)*(s-b)*(s-c));
    }
    else
    {
       return 0;
    }
}

int main()
{
       int a, b, c;
       std::cout<<"Enter the sides of the triangle: \t";
       std::cin>>a>>b>>c;
       double P=triangleArea (a, b, c);
       if (P==0)
       {
           std::cout<<"There is not a triangle with these sides";

       }
       else
       {
           std::cout<<"Its area is: \t"<<P;
       }

    return 0;
}