C - Palindromes——常量数组运用-蒲公英云

C - Palindromes——常量数组运用

男娘i 2022-06-18 05:37 211阅读 0赞

think:
1常量数组运用
2isalpha(char ch)——判断是否为英文字母
Presentation error错误
Hint:In addition, after each output line, you must print an empty line.

Vjudge题目链接

以下为Presentation error代码——每组数据输出后应输出换行

#include <bits/stdc++.h>
using namespace std;
char st[] = "A   3  HIL JM O   2TUVWXY51SE Z  8 ";
char tra(char ch)
{
    if(isalpha(ch))
        return st[ch-'A'];
    else
        return st[ch-'0'+25];
}
int main()
{
    char st1[24];
    int i, p, m;
    while(scanf("%s", st1) != EOF)
    {
        int len = strlen(st1);
        p = 1, m = 1;
        for(i = 0; i < (len+1)/2; i++)
        {
            if(st1[i] == '0')
                st1[i] = 'O';
            if(st1[i] != st1[len-1-i])
                p = 0;
            if(st1[i] != tra(st1[len-1-i]))
                m = 0;
        }
        if(p == 0 && m == 0)
            printf("%s -- is not a palindrome.\n", st1);
        else if(p == 1 && m == 0)
            printf("%s -- is a regular palindrome.\n", st1);
        else if(p == 0 && m == 1)
            printf("%s -- is a mirrored string.\n", st1);
        else
            printf("%s -- is a mirrored palindrome.\n", st1);
    }
    return 0;
}

以下为accepted代码

#include <bits/stdc++.h>
using namespace std;
char st[] = "A   3  HIL JM O   2TUVWXY51SE Z  8 ";
char tra(char ch)
{
    if(isalpha(ch))
        return st[ch-'A'];
    else
        return st[ch-'0'+25];
}
int main()
{
    char st1[24];
    int i, p, m;
    while(scanf("%s", st1) != EOF)
    {
        int len = strlen(st1);
        p = 1, m = 1;
        for(i = 0; i < (len+1)/2; i++)
        {
            if(st1[i] == '0')
                st1[i] = 'O';
            if(st1[i] != st1[len-1-i])
                p = 0;
            if(st1[i] != tra(st1[len-1-i]))
                m = 0;
        }
        if(p == 0 && m == 0)
            printf("%s -- is not a palindrome.\n", st1);
        else if(p == 1 && m == 0)
            printf("%s -- is a regular palindrome.\n", st1);
        else if(p == 0 && m == 1)
            printf("%s -- is a mirrored string.\n", st1);
        else
            printf("%s -- is a mirrored palindrome.\n", st1);
        printf("\n");
    }
    return 0;
}