C++ Area of Triangle
//uisng Heron's Formula
float first, second, third, semiperimeter, area;
cout << "Input the first side of the triangle: ";
cin >> first;
cout << "Input the first side of the triangle: ";
cin >> second;
cout << "Input the third side of the triangle: ";
cin >> third;
semiperimeter = (first + second + third)/2;
area = sqrt (semiperimeter*(semiperimeter-first)*(semiperimeter-second)*(semiperimeter-third));
cout << "The area of the triangle is " << area << endl;