Palindromes //简单字符串

你的名字 2022-08-06 00:17 116阅读 0赞

#include <stdio.h>
    #include <string.h>
    
    int main()
    {
        int i, mid, len;
        char stdc[50]= {'A',0,0,0,'3',0,0,'H','I','L',0,'J','M',0,'O',0,0,0,'2','T','U','V','W','X','Y','5','1','S','E',0,'Z',0,0,'8',0};<span style="white-space:pre">	</span>
        char ch[30];
        bool isr, ism;
    
        while( scanf("%s", ch)!=-1 )
        {
            isr = ism = true;
    		len = strlen(ch);
            mid = len / 2 + (len%2==0? 0:1);
            for(i=0; i<mid; i++)
            {
                if(ch[i] != ch[len-i-1])
                {
                    isr = false;
                    if(ch[i]>='A' && ch[i]<='Z')
                    {
                        if(ch[len-i-1] != stdc[ch[i]-'A'] )
                            ism = false;
                    }
                    else if(ch[i]>='0' && ch[i]<='9')
                    {
                        if(ch[len-i-1] != stdc[ch[i]-'0'+25] )
                            ism = false;
                    }
                }
    			else
    			{
    				if(ch[i]>='A' && ch[i]<='Z')
                    {
                        if(ch[len-i-1] != stdc[ch[i]-'A'] )
                            ism = false;
                    }
                    else if(ch[i]>='0' && ch[i]<='9')
                    {
                        if(ch[len-i-1] != stdc[ch[i]-'0'+25] )
                            ism = false;
                    }
    			}
    			if(!isr && !ism)	break;
            }
        printf("%s", ch);
        if(isr && ism)
            printf(" -- is a mirrored palindrome.\n");
        else if(isr)
            printf(" -- is a regular palindrome.\n");
        else if(ism)
            printf(" -- is a mirrored string.\n");
        else
            printf(" -- is not a palindrome.\n");
    	printf("\n");
        }
    
        return 0;
    }