初学者，就很暴力的写了C ，老是Runtime Error
#include<stdio.h>
#include<string.h>
int judge(int ,char [100][100]);
void main()
{
char input[100][100],temp[100];
int result[100];
int n,i=0;
memset(input,'\0',sizeof(input));

do 
{
	n=0;
	memset(input,'\0',sizeof (input));
	memset(temp,'\0',sizeof (temp));
	scanf("%s",temp);
	if (temp==EOF) break;
	while(strcmp(temp,"9"))
	{
		strcpy(input[n],temp);
		n++;
		scanf("%s",temp);
	}
	result[i]=judge(n,input);
	
	if (result[i]==0)
	printf("Set %d is immediately decodable\n",i+1);
	else if (result[i]==1)
	printf("Set %d is not immediately decodable\n",i+1);
	i++;
}
while (1);
}
int judge (int n ,char input[100][100])
{
int i,j,flag=0;
char temp[100];
//需要<n，n为输入的个数
for (i=0;i<n;i++)
	for (j=i;j<n;j++)
		if (strlen(input[j])<strlen(input[i])) 
			{strcpy(temp, input[i]);strcpy( input[i], input[j]);strcpy( input[j],temp);}

//进行判断了
for (i=0;i<n;i++)
{
	for (j=i+1;j<n;j++)
	{
		memset(temp,'\0',sizeof(temp));
		strncpy(temp,input[j],strlen(input[i]));
		if (strcmp(input[i],temp)==0)
		{
			flag=1;
			break;
		}
	}
if (flag==1) break;
}
return (flag);

}