|
|
|
|
|
|
|
The evaluation of && and || expressions is complicated by the
fact that certain subexpressions may not be evaluated at all.
In && expressions, the left-side operand is evaluated
first: If the value of the left-side operand is 0, the
right-side operand is ignored completely, and the value of the
&& expression is 0.
If both operands evaluate to some integer other than 0, the
value of the && expression is 1.
In || expressions, the left-side operand also is evaluated first: If
the left-side operand evaluates to some integer other than 0,
nothing else is done, and the value of the || expression is
1; if both operands evaluate to 0, the value of the ||
expression is 0.