//reverse()的实现#include 
     
      #include 
      
       char* reverse(char* s){    int i,j;    for (i=0,j=strlen(s)-1;        i
      
     

//reverse()函数模板的实现#include 
     
      #include 
      
       using namespace std;template 
       
        void reverse ( BidirectionalIterator first, BidirectionalIterator last){    while ((first!=last)&&(first!=--last))    {        *first = *first^*last;        *last = *first^*last;        *first = *first^*last;        ++first;    }}template 
        
         BidirectionalIterator reverse2(BidirectionalIterator first, BidirectionalIterator last){    BidirectionalIterator begin = first;    while ((first!=last)&&(first!=--last))    {        *first = *first^*last;        *last = *first^*last;        *first = *first^*last;        ++first;    }    return begin;}int main(){    char str[]="abcdefghijklmnopqrstuvwxyz";    cout << str << endl;    reverse(str,str+strlen(str));    cout << str << endl;    cout << reverse2(str,str+strlen(str)) << endl;    return 0;}