> #include <iostream.h>
> #include <string.h>
> #include <stdio.h>
> int Input(char *string){
> 	cin.getline(string,10);
> 	if(*string=='9')return 0;
> 	return 1;
> }
> int min(int x,int y){
> 	return x<y?x:y;
> }
> char string[10][11];
> void main(){
> 	int i=0,j,test=1;
> 	int lenth1,lenth2,k,n;
> 	int mi;
> 	int flag1,flag2;
> 	while(1){
> 		for(;i<10;i++)strcpy(string[i],"");
> 		i=0;
> 		while(Input(string[i])){i++;}
> 		for(j=0;j<i;j++){
> 			flag2=0;
> 			for(k=0;k<i;k++){
> 				if(j!=k){
> 					lenth1=strlen(string[j]);
> 					lenth2=strlen(string[k]);
> 					mi=min(lenth1,lenth2);
> 					flag1=0;
> 					for(n=0;n<mi;n++){
> 						if(string[j][n]==string[k][n])continue;
> 						else {
> 							flag1=1;
> 							break;
> 						}
> 					}
> 					if(flag1==0){flag2=1;break;}
> 				}
> 			}
> 			if (flag2==1)break;
> 		}
> 		if(flag2==1)printf("Set %d is not immediately decodable\n",test);
> 		else printf("Set %d is immediately decodable\n",test);
> 		test++;
> 	}
> }

while(1)结束不了