1047.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
char word[10][4]={{},{},{"ABC"},{"DEF"},{"GHI"},{"JKL"},{"MNO"},{"PRS"},{"TUV"},{"WXY"}};
int main(){
    char in[105];
    while(gets(in)!=NULL){
        int len=strlen(in),flag=0,numl;
        char num[8];
        memset(num,0,sizeof(num));
        for(int i=0,j=0;i<len;i++){
            if(in[i]<='9'&&in[i]>='2'){
                flag=1;
                num[j++]=in[i];
                numl=j;
                if(j>=7)break;
            }
            if(in[i]=='0'||in[i]=='1'){
                flag=-1;
                break;
            }
        }
        if(flag==-1){
            printf("Can't print a word!\n");
            memset(in,0,sizeof(in));
            continue;
        }
        if(flag==0){
            printf("None.\n");
            memset(in,0,sizeof(in));
            continue;
        }
        char out[2200][8]={0};
        //開始填入
        int t=pow(3,numl),tt=t,word_p=0;
        for(int p=0;p<numl;p++){
            for(int i=0;i<t;i++){
                out[i][p]=word[num[p]-'0'][word_p%3];
                if((i+1)%(tt/3)==0)word_p++;
            }
            tt=tt/3;
        }
        //結束填入
        for(int i=0;i<t;i++)
            printf("%s\n",out[i]);
        memset(in,0,sizeof(in));
    }
}