exchang.cpp

输入一个字符串

#include<iostream>
#include <string>
using namespace std;
void exchange(char *str) 
{ 
   char tmp; 
   int len, i, j;   
   len = strlen(str); //获取输入字符串长度
   for(i = 0, j = len-1;i != len/2; i++, j--)
   { 
      tmp = str[i]; 
      str[i] = str[j]; 
      str[j] = tmp; 
   } 
return; 
} 
int main() 
{ 
   char str[100];
   cout<<"请输入你的字符串:"<<endl;
   cin>>str;
   exchange(str); 
    cout<<str<<endl; 
   return 0; 
}