原创 打开新建关闭文件

/*
 * main.cpp
 *
 *  Created on: 2024-6-9
 *      Author: root
 */

#include
#include
#include
#include
#include
using namespace std;

int main()
{
	int f;
	const char *f_path="test";
	mode_t f_attrib;
	f_attrib=S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP |
			S_IROTH;
	f=open(f_path,O_RDONLY);
	if(f==-1)
	{
		f=open(f_path,O_RDWR | O_CREAT,f_attrib);
		if(f!=-1)
			puts("create one new file!");
		else
		{
			puts("can't create new file,program exit");
			return 1;
		}

	}
	else
		puts("file open success!");
	close(f);
	return 0;
}
y运行：