checkerrno.c

来自「LINUX C编程实战这本书附带光盘的原代码」· C语言 代码 · 共 18 行

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

int main()
{
	FILE	*stream;
	char	* filename = "test";
	errno = 0;

	stream = fopen (filename, "r");
	if (stream == NULL) {
		printf ("open file %s failed, errno is %d\n", filename,errno);
	}
	else
		printf ("open file %s successfully\n", filename);
}