一个简单的c程序，大家帮忙看一下！

harrypotter

/*this is a example of copy*/
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
main ()
{
  int a, b;
  char c[20];
  char d[20];
  char buf[1024];
  printf ("input file name of source:");
  scanf ("%s", c);
  printf ("input file name of destination:");
  scanf ("%s", d);
  a = open (c, O_RDWR);
  read (a, buf, 1024);
  close (a);
  printf ("%s", buf); /*test buf*/
  creat (buf, S_IRUSR | S_IWUSR);
  b = open (d, O_RDWR);
  write (b, buf, strlen (buf));
  close (b);
}
我的意思是文件复制，但总得到一个很怪的文件，如我文件11中内容为123 erty,我想复制给12,但总得到名为123 etry???的文件。

lucifer

先把文件名数组清空

harrypotter

不好意思，出了个小错误，应该是 creat (d, S_IRUSR | S_IWUSR);就对了。

wide288

harrypotter:请问你用的那些函数在那里可以找到说明呀。我一点也看不懂。如：open (c, O_RDWR);
read (a, buf, 1024);
close (a);
creat (d, S_IRUSR | S_IWUSR);
write (b, buf, strlen (buf));

harrypotter

买本函数说明或有关gcc的书就ok了

wide288

贴子深的太快了，书？有买的吗？没有见过你说的这两类书。有吗？

viper

By the way, you use read() to read in data from file, but you should not use strlen() to get the data length, as strlen len assume the string is terminated by a NULL (\0). use the return value of read to know how many byte you've read in from that file.

ltkun

标准的系统调用 任何一本操作系统都会讲的