回文串，镜像串，常量字符串数组

借鉴刘汝佳书的代码
不含有空格，所以可以用scanf函数直接输入
ctype.h头文件中isalpha(),isdigit(),isprint(),判断字符属性函数
toupper,tolower.等工具转换大小写

#include<stdio.h>
#include<string.h>
#include<ctype.h>
const char rev[] = "A   3  HIL JM O   2TUVWXY51SE Z  8 ";
const char  *msg[] = {"is not a palindrome","is a palindrome","is a mirror string","is a mirror palindrome"};
char r(char c)
{
    if(isalpha(c))
    return rev[c-'A'];
    else
        return rev[25+c-'0'];
}
int main()
{
    char s[30];
    while(scanf("%s",s) == 1)
    {
      int m = 1,p = 1;
    int len = strlen(s);
    for(int i =0;i < (len +1) / 2;i++)
    {
        if(s[i] != s[len - 1- i])
            p = 0;
        if(r(s[i]) != s[len - 1 - i])
            m = 0;
    }
    printf("%s---------%s",s,msg[m*2+p]);
    }
    return 0;

}