Mega Code Archive
Pass by reference using references
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#include <iostream>
void swap(int &x, int &y);
int main()
{
int x = 5, y = 10;
std::cout << "Main. Before swap, x: " << x
<< " y: " << y << "\n";
swap(x,y);
std::cout << "Main. After swap, x: " << x
<< " y: " << y << "\n";
return 0;
}
void swap (int &rx, int &ry)
{
int temp;
std::cout << "Swap. Before swap, rx: " << rx
<< " ry: " << ry << "\n";
temp = rx;
rx = ry;
ry = temp;
std::cout << "Swap. After swap, rx: " << rx
<< " ry: " << ry << "\n";
}
Main. Before swap, x: 5 y: 10
Swap. Before swap, rx: 5 ry: 10
Swap. After swap, rx: 10 ry: 5
Main. After swap, x: 10 y: 5
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