C++文件读写与文件夹创建

#include<bits/stdc++.h>
#include<io.h>
using namespace std;

void CreateFolder(){//创建文件夹 
//    string defaultPath = "F:\\database";
//    string folderPath = defaultPath + "\\testFolder"; 
//    string command = "mkdir -p " + folderPath; 
	string defaultPath = "C:\\Users\\Lenovo\\Desktop\\data";
	if(_access(defaultPath.c_str(),0)!=-1){//已存在 
		rmdir(defaultPath.c_str());
	}
    string command = "mkdir -p " + defaultPath;   
    system(command.c_str());
}

void CreateNum(){
	ofstream op;
	//op.open("C:\\Users\\Lenovo\\Desktop\\data\\1.txt",ios_base::app);
	op.open("C:\\Users\\Lenovo\\Desktop\\data\\1.txt");
	if(op==NULL) cout<<"Create Error!"<<endl; 
	srand((unsigned)time(NULL));
	for(int i=1;i<=10;i++){
		op<<rand()%1000<<' ';
	}
	op<<endl;
	op.close();
} 

int main(){
	CreateNum();
	ifstream op;
	op.open("C:\\Users\\Lenovo\\Desktop\\data\\1.txt");	
	int i;
	
	while(op>>i){
		if(op.eof()) break;
		cout<<i<<' ';
	}
	/*
	while(op.eof()){
		op>>i;
		cout<<i<<' ';//最后一个数据会读重复 
	}
	*/
	return 0;
}