逆向输出字符串

#include<iostream.h>#include<string.h>char *fun(char *pl){while(*pl++);pl--;return pl;}void main(){char a1[20],*q,*pl;cout<<"输入一个字符串：";cin.getline(a1,20);cout<<"逆向输出的字符串：";q=a1;pl=fun(a1);do{     cout<<*pl;pl--; }while(q<=pl);cout<<endl;}