Linux ϵĴíÎó error.h
errno
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ÓдíÎóʱʹÓ÷½·¨
fprintf(fp, "%s", strerror(errno))
perrorÓ÷¨
#include <stdio.h>
#include <stdlib.h>
#include<errno.h>
int main(void)
{
FILE *fp;
if((fp=fopen("aaa.txt","r+"))==NULL)
{
puts("²»ÄܽøÈëÎļþ");
perror("ÔÒò");
printf("errno=%d\n",errno);
exit(1);
}
system("PAUSE");
return 0;
}
fopen·µ»ØNULLÒòΪûÓÐÎļþ
#define EPERM 1 /* Operation not permitted */
#define ENOENT 2 /* No such file or directory */
#define ESRCH 3 /* No such process */
#define EINTR 4 /* Interrupted system call */
#define EIO 5 /* I/O error */
#define ENXIO 6 /* No such device or address */
#define E2BIG 7 /* Argument list too long */
#define ENOEXEC 8 /* Exec format error */
#define EBADF 9 /* Bad file number */
#define ECHILD 10 /* No child processes */
#define EAGAIN 11 /* Try again */
#define ENOMEM 12 /* Out of memory */
#define EACCES &
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