p5_8.cpp

相当丰富的C++源码

/**********************************************
*  p5_8.cpp                                   *   
*  实现两个数据交换的通用程序                 *
***********************************************/
#include <iostream>
using namespace std;
void swap_i(int *num1,int *num2)              //整型数交换
{ 
	int t;
    t=*num1;
    *num1=*num2;
    *num2=t;
}
void swap(void *num1,void *num2,int size) // 所有类型数据交换
{
	char *first=(char *)num1,*second=(char *)num2;
    for(int k=0;k<size;k++)
    { 
		char temp;
        temp=first[k];
        first[k]=second[k];
        second[k]=temp;
    }
}
void main()
{ 
   int a=3,b=6;
   double x=2.3,y=4.5;
   char c1[8]="John",c2[8]="Antony";
   cout<<"before swap:a="<<a<<"  b="<<b<<endl;
   swap_i(&a,&b);
   cout<<"after swap: a="<<a<<"  b="<<b<<endl;
   cout<<"before swap:x="<<x<<"  y="<<y<<endl;
   swap(&x,&y,sizeof(x));
   cout<<"after swap: x="<<x<<"  y="<<y<<endl;
   cout<<"before swap:c1="<<c1<<"  c2="<<c2<<endl;
   swap(&c1,&c2,sizeof(c1));
   cout<<"after swap: c1="<<c1<<"  c2="<<c2<<endl;
}