6.5.3.1 Prefix increment and decrement operators

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1071 The operand of the prefix increment or decrement operator shall have qualified or unqualified real or pointer type and shall be a modifiable lvalue.

1072 The value of the operand of the prefix ++ operator is incremented.

1073 The result is the new value of the operand after incrementation.

1074 The expression ++E is equivalent to (E+=1).

1075 See the discussions of additive operators and compound assignment for information on constraints, types, side effects, and conversions and the effects of operations on pointers.

1076 The prefix -- operator is analogous to the prefix ++ operator, except that the value of the operand is decremented.

1077 Forward references: additive operators (6.5.6), compound assignment (6.5.16.2).