题目：利用递归函数调用方式，将所输入的5个字符，以相反顺序打印出来。
#include"stdio.h"
void main()
{
    int i=5;
    void palin(int n);
    printf("\40:");
    palin(i);
    printf("\n");
}
void palin(int n)
{
    char next;
    if(n<=1)
    {
        next=getchar();
        printf("\n\0:");
        putchar(next);　
    }
    else
    {
        next=getchar();
        palin(n-1);
        putchar(next);
    }
}
Compiling...
30.cpp
E:\xyq\30.cpp(17) : error C2018: unknown character '0xa1'
E:\xyq\30.cpp(17) : error C2018: unknown character '0xa1'
Error executing cl.exe.

30.obj - 2 error(s), 0 warning(s)