Passing Arguments to Functions

[caradoc]

I am trying different ways of passing arguments to functions in C++. I wrote the below program which passes arguments to function by Passing a pointer by value.

void sample(int *t);
main()
{
int x;
int *p;
x = 10;
p = &x;
sample(p);
cout << "x is %d" << x << " \n";
}

void sample(int *i)
{
*i = *i + 1;
}

If I want to code the same function by using the concept of passing by reference how can I do that. Kindly guide me on the same.

[ashlee]

You can code the same function by using the concept of passing by reference in C++ as below:
void sample(int &t);
main()
{
int x;
x = 10;
sample(x);
cout << "x is %d" << x << " \n";
}

void sample(int &x)
{
x = x + 1;
}

In the above changes made to the reference passed in function sample will also be made to the original variable as it is passed by reference.