致命错误 C1083：无法打开包含文件：'fstream.h'：没有这样的文件或目录

Question

Hi I'm using visual C++ 2010 Express and I received that error when I compiled this sample program I downloaded "fatal error C1083: Cannot open include file: 'fstream.h': No such file or directory"

#include<fstream.h>
#include<string.h>
#include<stdio.h>
#include<ctype.h>
#include<conio.h>
#include<stdlib.h>
#include<dos.h>

and I tried putting in using namespace std; in the beginning of the code block, but I still received the error

Answer 1

Your sample code is very, very old. Definitely previous century. In this century, we use <fstream> . The problem with <fstream.h> was that it's not standardized, so there are quite some possibilities about what it can contain. The sample code you downloaded will have made some assumptions, and we can't guess.

In general, since we're talking about old code, it's going to predate namespace std; . That is to say, there's likely no std::ifstream class but there could be an ifstream class. You've commented that using namespace std; didn't help, which is the normal hack to get ifstream working after including <fstream> . It seems you would need another hack, or newer sample code.

Answer 2

Drop .h from <fstream.h> .

Add using namespace std; below the included header files.

Answer 3

Try without the '.h' at the end:

#include <fstream>

Edit:

It appears some further explanation is in order.

When you have some code that uses fstream for the compiler to understand what that code does it needs the declarations etc. from the fstream header file in the standard library. To tell the compiler to fetch that it needs an include statement. (Note: this explanation is slightly simplified for more info look up C++ preprossesor)

All the imports are handled first. When the compiler can't find file fstream.h it stops. Why? Because without a file that the programmer expects is necessary it is pointless to continue compiling the rest of the code. The code will (most likely) refer to names expected by the programmer to be defined in the missing file.

So when an included file is missing it is not looking any closer at the code you have written.

When you change the include statement to include the right file, the compilation can continue to look more closely at your code. From the comments I read that you get 'more errors'. But the errors are in your code.

As suggested try to fix them yourself. After that create a new question on stackoverflow about specific errors that you don't understand.

Answer 4

I have done this eror.Do not need to remove or add anything else.Only you install turboo C++. it code is turboo code.When i run it there is no eror to show me. go to bin folder and copy past code and run it. Hope it will help to another.

Answer 5

use gdb online compiler in that compiler select language as 'c++ turbo'

[gdb compiler][1]

hope it runs now :) [1]: https://www.onlinegdb.com/online_c++_compiler