3_8.cpp

来自「c++案例教程源代码」· C++ 代码 · 共 12 行

#include <iostream> 
using namespace std;
void swap(float, float);					//交换函数原型声明
int main()
{ float a = 22.2f, b = 44.4f;
  cout << "Before calling swap(a,b), a = " << a << ", b = " << b << endl;
  swap(a,b);  cout << "After calling swap(a,b), a = " << a << ", b = " << b << endl;
  return 0;
}
void swap(float x, float y){ 
	float temp = x;  x = y;  y = temp;} //交换x 和 y的值