这是我得代码，实在不知哪里格式有错误，求解啊
#include<stdio.h>
#include<string.h>
char  b[1002][1002] ;
int pop[1002] ;
int d[2000] ;
int main()
{
   
    int n ,t,max=0 , t0 , i, t1 , t2 , k ,j, l,sum;
    while(scanf("%d",&n)!=EOF)
    {
        t=0 ;
        if(n==0) return 0 ;
        max=0 ;
        memset(d , 0 ,sizeof(d)) ;
        memset(b , 0 ,sizeof(b)) ;
        memset(pop , 0 , sizeof(pop)) ;
        for(i=0 ; i<n ; i++)
        {
            sum=0 ;
            scanf("%s",&b[i]) ;
            l=strlen(b[i]) ;
            for(j=0 ; j!=i ; j++)
            {
                if(strcmp(b[i],b[j])==0)
                    d[i]++ ;
            }
            if(d[i]>=max)
            {
                max=d[i] ;
                pop[i]=max ;
        
            }
        }
        for(i=0 ; i<=n ; i++)
        {
            if(pop[i]==max)
                printf("%s\n",b[i]) ;
        }
   
        
    }

    return 0 ;
}

过了，稍微改了一下，可能是第二个for j要取等吧，谢谢各位了
#include<stdio.h>
#include<string.h>
char  b[1002][20] ;
int d ;
int main()
{
   
    int n ,max  , i ,j , pop;
    while(scanf("%d",&n)!=EOF)
    {
      
        if(n==0) break ;
        max=0 ;
        for(i=0 ; i<n ; i++)
        {
            d=0 ;
            scanf("%s",b[i]) ;
            for(j=0 ; j<=i ; j++)
            {
                if(strcmp(b[i],b[j])==0)
                    d++ ;
            }
            if(d>max)
            {
                max=d ;
                pop=i ;
               
            }
        }
        for(i=0 ; i<=n ; i++)
        {
            if(i==pop)
                printf("%s\n",b[i]) ;
        }
     }
    return 0 ;
}