char ANS[] 可以用printf("%s")的么？
> #include<iostream>
> #include<algorithm>
> #include<vector>
> #include<map>
> #include<stdio.h>
> using namespace std;
> 
> map<char,bool>my;
> int main()
> {
> 	int n,best,tot,t,i,j,p,pp;
> 	char str[105][5],ANS[5];
> 	while(scanf("%d",&n)!=EOF)
> 	{
> 		if(n==0)
> 		   break;
> 	    best=999999999;
> 	    for(i=0;i<n;i++)
> 		{
> 			scanf("%s",str[i]);
> 		}
> 		char ans[]={'A','B','C','D','E'};
> 		do
> 		{
> 		    tot=0;
> 			for(t=0;t<n;t++)
> 			{
> 				my.clear();
> 				for(i=0;i<5;i++)
> 				{
> 					my[str[t][i]]=1;
> 					for(j=0;j<5;j++)
> 					{
> 						if(!my[ans[j]])
> 						   tot++;
> 					    if(ans[j]==str[t][i])
> 					       break;
> 					}
> 				}
> 			}
> 			if(tot<best)
> 			{
> 				best=tot;
> 				for(i=0;i<5;i++)
> 				{
> 					ANS[i]=ans[i];
> 				}
> 			}
> 		}while(next_permutation(ans,ans+5));
> 		printf("%s is the median ranking with value %d.\n",ANS,best);
> 	}
> }