Check out example codes for "c++ program for addition of two numbers using functions". It will help you in understanding the concepts better.

Code Example 1

#include <iostream>
using namespace std;

//function declaration
int addition(int a,int b);

int main()
	int a,b;	//to store numbers
	int add;	//to store addition 
	//read numbers
	cout<<"Enter first number: ";
	cout<<"Enter second number: ";
	//call function
	//print addition
	cout<<"Addition is: "<<add<<endl;
	return 0;

//function definition
int addition(int a,int b)
	return (a+b);

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