CODEWITHSUNDEEP
c++visual-studio
Jaood
Jaood

Reputation: 411

C++ cannot open source file

In C++ with Visual studio 2017,

I copied some header files into my project folder, then added them under the "solution explorer" in c++. Now when I write 

#include "name.h"

it prints an error under include, and says "cannot open source file".

Why, and what can I potentially do to fix it?

I only just downloaded VS and am learning c++ for the first time.

Upvotes: 18

Views: 348018

Answers (10)

Lê Văn Hiếu
Lê Văn Hiếu

Reputation: 299

please aware that the Properties page is depend on Configuration build. You may need to check that select correct Configuration build in Project Property page. enter image description here

Upvotes: 0

Omega
Omega

Reputation: 1

if none of above answers does not solve your problem I would suggest changing your included header to one that match your case as example instead of using (for windows):

#include <unistd.h> //read() , write() , sleep()..

you can use:

#include <io.h>  // _read() , _write() 
#include <windows.h>  //sleep()

make sure that your system support included headers

I wish it solved future problems.

Upvotes: 0

mvveselov
mvveselov

Reputation: 1

In Visual Studio, Right click on project and in Configuration Properties find C/C++ and then General/ In The window at the right side pick up a directory at Additional Include Directories row.

All these steps described above to resolve problem of finding header file work if you perform them both for 64-bit and for 32-bit platform. Or you can choose all Platforms item in the Configuration settings above

Upvotes: 0

Abyss
Abyss

Reputation: 1

Go to project properties and set configuration and platform to ALL and then under C/C++ -> General -> Additional Include Directories add $(SolutionDir)(use this if your solution is stored where your project is stored if not then navigate wherever you have stored your projects header files and hit enter.

Upvotes: 0

Abdelrahman Eltohamy
Abdelrahman Eltohamy

Reputation: 1

Note: This answer is good if you use Microsoft Visual Studio IDE.

This error usually occurs when the compiler cannot find the header file.

You can try the following steps:

  1. Right-click on the project name in the Solution Explorer window.
  2. Select Properties.
  3. Under Configuration Properties, click on C/C++.
  4. Under General, add the directory to your header files under the Additional Include Directories section.
  5. Save your changes and try building your project again.

Upvotes: 0

Captain Quack
Captain Quack

Reputation: 87

Edit: This question was just recently updated, this answer is no longer relevant.

For anyone here that still hasn't found a way to fix this, try to modify/redownload Python with the boxes for Download debugging symbols and Download debug binaries Checked.

Read more at a mslearn article and this helpful tutorial site called DelftStack.

Upvotes: 0

Falling Forward
Falling Forward

Reputation: 79

For anyone still scratching their heads, you're not "supposed to" #include your own headerfiles with triangle quotes (<>), You're supposed to use "Quotation marks". It is a common mistake.

Upvotes: 2

jskattt797
jskattt797

Reputation: 271

There is more information here on how to deal with this problem: Where does Visual Studio look for C++ header files?

For me, I followed xflowXen's answer and then at "Include Directories" typed in the specific pathname where my header file was located followed by a semicolon, something like: C:\Users\name\source\repos\p2-A\p2-A; then applied the changes and the issue went away.

Upvotes: 4

xflowXen
xflowXen

Reputation: 446

If you're using Visual studio, right click on the project and then on Properties, Under Configuration Properties click on C\C++ and then add the directory to your header files under the Additional Include Directories section.

Upvotes: 24

doron
doron

Reputation: 28872

Visual Studio (or rather the compiler) needs to know where to look for the included file. Check out your include path in your VS project.

Upvotes: 0

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