How to express it in c++

The

&& operator is the logical AND operator in C, which outputs true only if both boolean values ​​are true: if the first boolean value is false, it simply returns false. If the first Boolean value is true, continue evaluating the second Boolean value and return true if it is also true, otherwise return false.

&& operator in C

&& operator is the logical AND operator in C, used for Compare Boolean values. It operates on two boolean values ​​and the result is true only if both boolean values ​​are true.

Syntax

<code class="cpp">bool_result = bool_value1 && bool_value2;</code>

Behavior

• If bool_value1 is false, return directly bool_value1.
• If bool_value1 is true, continue evaluating bool_value2.
• If bool_value2 is also true, the result is true; otherwise, it is false.

Priority and associativity

The && operator has a higher priority than the || operator and a lower priority than =. It is left-associative, which means it evaluates from left to right.

Example

<code class="cpp">// 当 x 和 y 都为真时，结果为真
if (x && y) { ... }

// 如果 x 为真，则执行操作，否则跳过操作
x && do_something();</code>

Differences from the || operator

&& operator only works when both Boolean values ​​are The || operator returns true if at least one boolean value is true.

Purpose

&& operator is usually used in the following scenarios:

• Check whether multiple conditions are true at the same time
• Short-circuit evaluation when a condition fails (avoid unnecessary calculations)
• Execute code only under certain conditions

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