Increment operator ++

The ++ (increment) operator adds 1 to the value of a scalar operand, or if the operand is a pointer, increments the operand by the size of the object to which it points. The operand receives the result of the increment operation. The operand must be a modifiable lvalue of arithmetic or pointer type.

You can put the ++ before or after the operand. If it appears before the operand, the operand is incremented. The incremented value is then used in the expression. If you put the ++ after the operand, the value of the operand is used in the expression before the operand is incremented. For example:

play = ++play1 + play2++;

is similar to the following expressions; play2 is altered before play:

int temp, temp1, temp2;

temp1 = play1 + 1;
temp2 = play2;
play1 = temp1;
temp = temp1 + temp2;
play2 = play2 + 1;
play = temp;

The result has the same type as the operand after integral promotion.

The usual arithmetic conversions on the operand are performed.