What does !(a+b) equal in C language?

In C language, (a b) equals undefined behavior because a and b are undefined variables and the compiler cannot determine their actual values.

(a b) What is equal to in C language?

In C language, (a b) equals undefined behavior.

Cause:

• (a b) is an expression where a and b are undefined variables .
• The C language does not initialize undefined variables, so their actual values ​​are unpredictable.
• During the compilation phase, the compiler cannot determine the values ​​of a and b, and therefore cannot determine the value of the expression.

The C compiler may issue warnings or errors when using undefined variables. To avoid this problem, variables should be initialized or assigned before using them. For example:

<code class="c">int a, b;
a = 5;
b = 10;
int result = a + b;</code>

In the above example, a and b have been initialized to 5 and 10 respectively, so (a b) evaluates to 15 .

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