What is C++ inline function?

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First, C++ inline function 1. Inline

There is the concept of macro function in C language. The characteristic of macro function is that it is embedded in the calling code, which avoids the overhead of function call. However, because the processing of macro functions occurs in the preprocessing stage, syntax detection and possible semantic errors are missing.

two。 Grammar

C++ provides the inline keyword for real embedding.

Macro function VS inline function

# include # include using namespace std / / advantages: embedded code, stack-free and stack-free overhead / / disadvantages: code replacement, easy to make the generated code larger, prone to logic errors, untyped checking # define SQR (x) ((x) * (x)) / / advantages: high abstraction, avoid repeated development, type checking / / disadvantages: stack pressing and unstack, resulting in overhead inline int sqr (int x) {return (x) * (x) } int main () {int iTuno; while (I