What does a-- mean in C language?

In C language, "a--" means the postfix decrement operator, which is used to decrease the value of variable a by 1. It first gets the current value of a, then decrements the value by 1 and reassigns it to a. 1. Operation principle: Get the value → Subtract 1 → Reassign the value 2. Usage: Decrease the value of the variable step by step in a loop or conditional statement

C The meaning of a-- in the language

In C language, "a--" is the postfix decrement operator, which is used to decrement the value of variable a by 1.

Operation principle:

The postfix decrement operator first obtains the current value of variable a, then decrements the value by 1, and finally reassigns the reduced value to the variable a.

Usage:

The postfix decrement operator is usually used in loops or conditional statements to reduce the value of a variable step by step.

Example:

<code class="c">int a = 10;

// 将 a 减 1
a--;

printf("a 的值：%d\n", a); // 输出：9</code>

It should be noted that the postfix decrement operator is different from the prefix decrement operator "--a". The prefix decrement operator decrements before getting the variable value, while the postfix decrement operator decrements after getting the variable value.

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