How to use C++ ordinary function pointer

This article introduces the knowledge of "how to use C++ ordinary function pointers". In the operation of practical cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

C++ programming, you often need to call other functions in a function, this will take into account the use of function pointers, a function can call other functions. In a well-designed program, each function has a specific purpose, the use of ordinary function pointers.

First of all, let's look at the following example:

# include # include # include using namespace std; bool IsRed (string color) {return (color = = "red");} bool IsGreen (string color) {return (color = = "green");} bool IsBlue (string color) {return (color = = "blue");} void DoSomethingAboutRed () {cout