Fstream doens't打開一個文件，ofstream是

Question

嗨，我正在處理兩個txt文件。在第一個，我用fstream打開文件，但是當我試圖用fstream打開第二個文件不起作用時，但是如果我嘗試使用ofstream作品打開它。任何線索是怎麼回事？下面是功能。由於

void stack::read() 
{ 
    string name = "file.txt", line; 
    fstream file; 
    file.open(name.c_str());//open the file 
    char cc; 

    if (!file) 
    { 
     cout << "Error could not open the file" << endl; 
     return; 
    } 
    else 
    { 
     //file was opened succesful 
     while (file) 
     { 
      file.get(cc);//get each character of the string 
      push(cc);//insert the character into the stack 

     } 
    } 
    file.close();//close the file 
} 

void stack::write() 
{ 
    item *r = stackPtr;//point to the top element of the stack 
    ofstream file; 
    string name = "f.txt"; 
    file.open(name.c_str()); 

    if (!file) 
    { 
     cout << "Could not open the file" << endl; 
     return; 

    } 
    else 
    { 
     while (r != NULL)//while r has data write to the file 
     { 
      file << r->character; //write to the file 
      r = r->prev;//move to the prev element in the stack 
     } 
    } 
    file.close(); 
} 

Answer 1

如果文件不存在，它可以與ofstream打開（它會創建同名的新文件）。但fstream.open()沒有第二個參數假定讀取模式，如果該文件不存在，它將不會被打開。

你確定你沒有拼錯文件名嗎？