#include <stdio.h>
#include<string.h>
void reverse(char s[])
{
int len;
len = strlen(s);
if (len == 1)
{
printf("%c", s[0]);
}
else
{
reverse(s + 1);
printf("%c", s[0]);
}
}
int main()
{
char s[100];
printf("input your string:\n");
scanf("%s", s);
reverse(s);
}
数组本质是指针,arr表示arr[0],arr+k即arr[k],s+1表示传入s[1]为头的地址,相当于传入了将s[0]去掉后的s[]