1/24/00
COM1100 Winter2000 Lecture 7
12
Functions
-- parameter passed by reference
-- parameter passed by reference
nvoid Swap(int& x,
int& y); //
function declaration
nvoid Swap(int& x,
int& y) { //
function implementation
int temp;
cout << “ x =
“ << x << “ y = “ << y << endl; //
x=5 y =9
temp
= x;
n x = y;
n y = temp;
cout
<< “ x = “ << x << “
y = “ << y << endl;
// x=9 y =5
}
nint main() {
int m = 5, n = 9;
Swap(m, n); // function call
cout << “ n = “ << m << “ n = “
<< n << endl; // m=9 y =5
return 0;
}