小编nec*_*net的帖子

为什么这样做:

char *fd = "myfile.txt";
struct stat buf;          

stat(fd, &buf);
int size = buf.st_size;

printf("%d",size);

但这不起作用:

char *fd = "myfile.txt";
struct stat *buf;          

stat(fd, buf);
int size = buf->st_size;

printf("%d",size);