c++中使用ifstream打开文件失败。

Question

ifstream input("D:\\trans.txt");

ifstream input；
inout.open("D:\\trans.txt",ifstream::in);

wchar_t const name[] = L"D:\\trans.txt";
ifstream input(name);

上面的几种方法都试了，还在exe文件右键以管理员身份运行了，但还是打不开文件。
网上也没找到解决方法。请问要怎么办。谢谢。

Answer 1

What is the specific error? I wrote it myself and tried it. It can be opened. You can copy it and try it. Could it be that I forgot to read from the file, or did I use cin to read?

#include <fstream>
#include <iostream>
#include <string>

using namespace std;

int main()
{
    ifstream in("D:\zz.txt");
    string res;
    while (getline(in, res))
    {
        cout << res << endl;
    }
    return 0;
}

Let’s try this one below. . . , directly read the characters into the file, and then open it, and see if it can be opened successfully? I can try it, can you try it? . . .

#include <fstream>
#include <iostream>
#include <string>

using namespace std;

int main()
{
     ofstream ou("D:\zz.txt");
     string test("hello world");
     ou << test << endl;
    ifstream in("D:\zz.txt");
    if (in.is_open())
    {
        cout << "opened!\n";
    }
    string res;
    while (getline(in, res))
    {
        cout << res << endl;
    }
    return 0;
}

Answer 2

Does the file being opened exist?