4.5－按值传递.cpp

Visual C++的课件

//Listing 9.5 Demonstrates passing by value

#include <iostream.h>

void swap(int x, int y);

int main()
{
	int x = 5, y = 10;

	cout << "Main. Before swap, x: " << x << " y: " << y << "\n";
	swap(x,y);
	cout << "Main. After swap, x: " << x << " y: " << y << "\n";
	return 0;
}

void swap (int x, int y)
{
	int temp;

	cout << "Swap. Before swap, x: " << x << " y: " << y << "\n";

	temp = x;
	x = y;
	y = temp;

	cout << "Swap. After swap, x: " << x << " y: " << y << "\n";

}