What does a*=a mean in C language?

In C language, the a = a operator performs compound assignment, which is equivalent to a = a a, multiplying the value of a by itself and storing it back in a. Operation steps: 1. Calculate a * a; 2. Store the new value back to a. This operator simply computes the squared value of a variable.

The meaning of a *= a in C language

In C language, a *= The a operator performs compound assignment to variable a, which is equivalent to a = a * a. It multiplies the value of variable a by itself and stores it back in a.

Operation steps:

1. Calculate a * a and get a new value.
2. Store the new value back to a, overwriting the original value.

Example:

<code class="c">int a = 5;
a *= a; // a 的值为 5 * 5 = 25</code>

Benefits:

a *= a Operator Normally Used to quickly calculate the square value of a variable, which is simpler than using a * a.

Note:

This operator can only be used for existing variables. This operator will cause a compiler error if a is undefined.

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