Question

文件读入单词一直不停是为什么呢？调试后显示这个 program received signal sigsegv,segmentation fault

是个新手 实在找不到为什么结果就是 屏幕输出文件的内容后又继续无限输出空白
新建的文件也是空白的
#include<stdio.h>
#include<stdlib.h>
#define LEN sizeof(struct Words)
struct Words
{char wd[20];
struct Words*next;
};
FILE *in,*out;
struct Words*creat(void)
{struct Words*head,*p1,*p2;
int n=0;
p1=p2=(struct Words*)malloc(LEN);
fscanf(in,"%s",p1->wd);
printf("%s\n",p1->wd);
head=NULL;
while(p1->wd!=0)//??
{n=n+1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=(struct Words*)malloc(LEN);
fscanf(in,"%s",p1->wd);
printf("%s\n",p1->wd);
}
p2->next=NULL;
return(head);
}
int main()
{struct Words*pt;
char infile[20];
printf("Enter file name:");
scanf("%s",infile);
in=fopen(infile,"r");
out=fopen("words2.txt","w");
if(in==NULL||out==NULL)
{printf("Open the file failure...\n");
exit(0);
}
printf("Opening file...");
pt=creat();
while(pt==NULL)
{fprintf(out,"%s\n",pt->wd);
printf("%s\n",pt->wd);
pt=pt->next;
}
fclose(in);
getchar();
return 0;
}

Answer 1

#include #include s; cout << s; return 0;}//这样才行