Question

#include <iostream>
#include <windows.h>
#include <Lmcons.h>
#include <fstream>
using namespace std;
main(){
char username[UNLEN+1];
DWORD username_len = UNLEN+1;
GetUserName(username, &username_len);
string cmd("C:\\Users\\");
cmd+=username;
cmd+=("\\AppData\\Roaming\\MiniApps");
}

现在我在“cmd”中有完整的路径网址，我想将此变量用作c ++文件处理中的路径。喜欢

ofstream file;
file.open(cmd,ios::out|ios::app);

Answer 1

使用C ++ 11，你可以做到

ofstream file(cmd,ios::app);

没有你必须做的

ofstream file(cmd.c_str(),ios::app);

Answer 2

使用ofstream打开文件流，编写内容并关闭。

#include<iostream>
#include <windows.h>
#include <Lmcons.h>
#include <fstream>
#include <string>

int main(){
    char username[UNLEN+1];
    DWORD username_len = UNLEN+1;
    GetUserName(username, &username_len);
    std::string cmd("C:\\Users\\");
    cmd+=username;
    cmd+=("\\AppData\\Roaming\\MiniApps.txt");
    std::ofstream file;
    file.open (cmd.c_str(), std::ofstream::out | std::ofstream::app);
    file << " Hello World";
    file.close();
    return 0;
}

如何在C ++中将字符串变量用作路径url

2 个答案: