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Linux ϵĴíÎó error.h

  errno
ÊǸöint±äÁ¿£¬·µ»Ø´íÎó
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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