5.9. More encapsulation

To demonstrate encapsulation again, I’ll take the code from the previous section and wrap it up in a function:

void multiples_table () {
  int i = 1;
  while (i <= 6) {
    print_multiples (i);
    i = i + 1;
  }
}

The process I am demonstrating is a common development plan. You develop code gradually by adding lines to main or someplace else, and then when you get it working, you extract it and wrap it up in a function.

The reason this is useful is that you sometimes don’t know when you start writing exactly how to divide the program into functions. This approach lets you design as you go along.

The active code below uses the multiples_table function. Run the active code to see what happens!

#include <iostream> void print_multiples (int n) { using std::cout; int i = 1; while (i <= 6) { cout << n*i << '\t'; i = i + 1; } cout << '\n'; } void multiples_table() { int i = 1; while (i <= 6) { print_multiples (i); i = i + 1; } } int main() { multiples_table(); }

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