#include<iostream.h>void p(char s[], int i){ if(s[i])p(s,i+1); //if条件成立,即进行递归 cout<<s[i]; //按反序输出字符串中的各个字符}void main(){ char str[100]; cout<<"输入一个字符串:"; cin.getline(str,100); cout<<str<<'\n'; p(str,0); cout<<'\n';}