비쥬얼 스튜디오에서 실행했을때는 정상적으로 실행이 되는데 시그윈으로 실행을했을때는

단어를 입력하세요:*s*s*                  <- *s*s단어 입력
segmentation fault (core dump)

이렇게 출력이됩니다.. 어디가 문제일까요?;;;

#include<stdio.h>
#include<ctype.h>
#include<string.h>
#define SIZE 20

void closetest(int state);
int check(char *word, char *exp);


int main()
{
        FILE *file1,*file;
        char str[SIZE];
        char word[SIZE];
        char ch;
        int PatternCheck,WordCount=0;
        int i;

        for(i=0;i<5;i++){
                file1=fopen("c:\\sample2.txt","w");
                file=fopen("c:\\sample.txt","r");
                if(file==NULL){
                        printf("file open error!\n");
                        return 1;
                }
                if(file1=NULL){
                        printf("file1 open error!\n");
                        return 1;
                }
                
                printf("단어를 입력하세요:");               
                scanf("%s",word);

                while(!feof(file)){
                        ch=fgetc(file);
                        if(isalpha(ch)==0)
                                ch=' ';
                        fputc(ch,file1);
                }
                
                closetest(fclose(file));
                closetest(fclose(file1));

                file1=fopen("c:\\sample2.txt","r");
                if(file1==NULL){
                        printf("file1 open error!\n");
                        return 1;
                }

                while(!feof(file1)){
                        fscanf(file1,"%s",str);
                        PatternCheck=check(str,word);
                        if(PatternCheck==1){
                                WordCount++;
                                printf("%s\n",str);
                        }
                }

                closetest(fclose(file1));
                printf("총 %d개의 %s를 찾았습니다.\n",WordCount,word);
        }
        return 0;
}

void closetest(int state){
        if(state!=0){
                printf("file close error!\n");
        }
}

int check(char *word,char *exp){
        if( strlen(word)==0 && strlen(exp) ==0 )
                return 1;

        if(word[0]==exp[0])
                return check(word+1,exp+1);

        if(exp[0]=='?')
                return check(word,exp+1)||check(word+1,exp+1);

        if(exp[0]=='*'){
                if(strlen(word)!=0)
                        return check(word,exp+1)||check(word+1,exp);
                else
                        return check(word,exp+1);
        }
        return 0;
}