|Why functions?||Next Slide|
Often, we need to use one set of code over and over again.
Functions allow us to write code once and reuse it many times.
For example, we might use a function to calculate the length of the hypotenuse of a right triangle:
cout << "Enter triangle width: "; cin >> w; cout << "Enter triangle height: "; cin >> h; cout << "The hypotenuse is " << hypotenuse(w, h) << endl;
Using functions can act as documentation (if they are given appropriate
names). Compare the instant recognition of