ex2-8-3.cpp

来自「一些学习c++的例题」· C++ 代码 · 共 27 行

#include <iostream>

using namespace std;

void swap(int *pa, int *pb);

void main(void)
{
   int i = 9, j = 99;

   cout << "Demonstration: call by pointer" << endl;

   cout << "Before swapped, i=" << i << ", j=" << j << endl;
   swap(&i, &j);
   cout << "After swapped, i=" << i << ", j=" << j << endl;
}

void swap(int *pa, int *pb)
{
   int t = *pa;

   cout << "\tSwapping, before swapped, *pa=" << *pa << ", *pb=" << *pb << endl;
   *pa = *pb;
   *pb = t;
   cout << "\tSwapping, after swapped, *pa=" << *pa << ", *pb=" << *pb << endl;
}