Reference Variable (cont.)

• A SINGLE variable with TWO names.

• Must be initialized when defined.

• Most often use is a function parameters.

• Study figure 8.2 and be sure you see how reference variables implement “pass by reference”.

  • int times(20); // in main
  • grumpy(times) // “ “
  • void grumpy(int & x) // in function
  • { x = 12; } // changes value in times

• Practice: swaps.cpp in prata