poj2608---几个字母映射到同一个数字

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
int map[26]={0,1,2,3,0,1,2,0,0,2,2,4,5,5,0,1,2,6,2,3,0,1,0,2,0,2};
int main()
{
    char str[20];
    int i;
    while(scanf("%s",str) != EOF )
    {
        for(i=0; i < strlen(str); i++)
        {
            if(str[i] == 'A' ||str[i] == 'E'||str[i] == 'I'||str[i] == 'O'||str[i] == 'U'||str[i] == 'H'||str[i] == 'W'||str[i] == 'Y')
                continue;
            else
            {
                if(i == 0)
                    printf("%d",map[str[0] - 'A']);
                else
                {
                    if(map[ str[i] - 'A'] == map[ str[i-1] - 'A'])
                        continue;
                    else
                        printf("%d",map[str[i] - 'A']);
                }
            }
        }//for
        printf("\n");
    }
    return 0;
}