What is the method of defining inline functions in C++?

The way to define an inline function in C++ is to add the keyword “inline” before the function declaration. Inline functions are inserted directly at the place where they are called during compilation, rather than generating a function call instruction like regular functions.

Here is an example of the definition of inline functions:

inline int max(int a, int b) {
  return (a > b) ? a : b;
}

When using inline functions, the compiler replaces the function call with the code from the function body to improve program efficiency. However, it is important to note that inline functions are best suited for small function bodies, as larger ones may lead to code bloat and decrease program performance. Therefore, inline functions are typically defined in header files for inline expansion where needed.