UVa 401 - Palindromes

#include<stdio.h>
#include<string.h>

int a,b,c,len,i,j;
int palindrome(char line [])
{
    int k=1;
    len=strlen(line);
    for(i=0,j=len-1; i<len,j>=0; i++,j--)
    {
        if (line[i]==line[j] )
            continue;
        else
        {
            k=0;
            break;
        }
    }
    if(k==1)
        return 1;
    else
        return 0;
}

int mirpalin(char line[])
{
    int k=0;
    len=strlen(line);
    for(i=0; i<len; i++)
    {
        if(line[i]=='A'||line[i]=='H'||line[i]=='I'||line[i]=='L'||
                line[i]=='M'||line[i]=='O'||line[i]=='T'||line[i]=='U'||
                line[i]=='V'||line[i]=='W'||line[i]=='X'||
                line[i]=='Y'||
                line[i]=='1'||line[i]=='8'||line[i]=='0')
            k++;
    }
    if(k==len)
        return 1;
    else
        return 0;
}


int mirrorstring(char line[])
{
    int k,a=1;
    len=strlen(line);
    for(i=0; i<len; i++)
    {
        if(line[i]=='E')
            line[i]='3';
        else if(line[i]=='J')
            line[i]='L';
        else if(line[i]=='0')
            line[i]='O';
        else if(line[i]=='S')
            line[i]='2';
        else if(line[i]=='Z')
            line[i]='5';
        else
            continue;
    }
    a=palindrome(line);
    if(a==1)
        return 1;
    else
        return 0;
}


int main()
{

    char line[22];
    int pd,ms,mp;
    while(gets(line))
    {
        len=strlen(line);
        for(i=0; i<len; i++)
            printf("%c",line[i]);
        pd=palindrome(line);
        if(pd==1)
        {
            mp=mirpalin(line);
            if(mp==1)
                printf(" -- is a mirrored palindrome.\n\n");
            else
                printf(" -- is a regular palindrome.\n\n");
        }
        else
        {
            ms=mirrorstring(line);
            if(ms==1)
                printf(" -- is a mirrored string.\n\n");
            else
                printf(" -- is not a palindrome.\n\n");
        }
    }
}

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