求 大佬 解答 EXE停止工作

代码如下
#include
#include
int main()
{
FILE* fi = fopen("1","r");
if (fi = NULL){
printf("失败");
return 1;
}
char name[20];
int age;
double weight;
fscanf(fi, "%s", name);
fscanf(fi, "%d %lf", &age, &weight);
fclose(fi);
printf("%s %d %g\n", name, age, weight);
getchar();
return 0;
}

判断的时候 fi==NULL