In addition to the arithmetic assignment operators, C++ also provides two unary operators for adding 1 to or subtracting 1 from the value of a numeric variable. These are the unary increment operator,
++, and the unary decrement operator,
--, which are summarized in Fig. 4.14. A program can increment by 1 the value of a variable called
c using the increment operator,
++, rather than the expression
c = c + 1 or
c += 1. An increment or decrement operator that’s prefixed to (placed before) a variable is referred to as the prefix increment or prefix decrement operator, respectively. An increment or decrement operator that’s postfixed to (placed after) a variable is referred to as the postfix increment or ...