C + + functions

C + + function one, function introduction

A function is a method, which is a piece of code to implement a specific function

Second, function structure

return value type function name (parameter list) {

function body

}

Sum function
int sum (int a,int b) {
return a+b;
}

Forget function structure How to write, think of the main function structure, the main function will always write it

int main ()
{
}

The int description has a return value, the main description has the function name, the parentheses () description has the argument list, the curly brace {} Indicates the function body

Third, the Code

1 /*2 Function3 simple usage of functions4 */ 5#include <iostream>6 using namespacestd;7 8 //function Declaration9 intSumintAintb); Ten //Sum function One intSumintAintb) { A     returnA +b; - } -  the intMain () - { -     intans; -     //function Call +Ans=sum (3,5); -printf"%d\n", ans); +     return 0; A}

Iv. Results

8

C + + functions