Beginner-function print out

[kmce]

I am just starting c++ and having a slight issue understanding a piece of code.

#include<iostream>
using namespace std;

void Add25(int &b)
{
	b = b + 25;
}

int main()
{
	int a = 10;
	Add25(a);
	cout << a << endl;
	system("pause");
		return 0;
}

Why is it cout << a and not b. since b is actually the calculation and a is just being used for a value?

[cire]

b is a variable that is local to the function Add25. It does not exist in main.

[cire]

Yes that is right. He doesn't really understand the "&" part

I'm glad you can read minds and deign to share it with us mundane folk.

b is a variable which exists only in Add25 which is the reason it can't be accessed in main. If b were not a reference it still couldn't be accessed in main. b being a reference doesn't have any effect on where it may accessed. That is determined solely by the scope of the variable.