#include <iostream>using namespace std;#include <sys/stat.h>#include <fcntl.h>#include <unistd.h>int main(){	umask(0027);	char name[256];	cout << "輸入要創建的文件名:" << endl;	cin >> name;	if(creat(name, 0666)<0)		cout << "創建失敗!" << endl;	else		cout << "創建成功!" << endl;	cout << "輸入要刪除的文件名:" << endl;	cin >> name;	if(unlink(name)<0)		cout << "刪除失敗!" << endl;	else		cout << "刪除成功!" << endl;	char newname[256];	cout << "請輸入要改名的文件:";	cin >> name;	if(access(name, F_OK)<0)		cout << "不存在" << name << endl;	else{		cout << "你對這個文件的權限:";		if(access(name, R_OK)>=0)cout<<"讀";		if(access(name, W_OK)>=0)cout<<"寫";		if(access(name, X_OK)>=0)cout<<"執行";		cout << endl;		cout << "請輸入要改成的新名字:";		cin >> newname;		if(rename(name, newname)<0)			cout << "改名失敗!" << endl;		else			cout << "改名成功!" << endl;	}}