visual studio 2019 - C++ 无法打开源文件

Question

I am using Microsoft Visual Studio Community 2019 Version 16.8.4 on a Windows 10 machine.

I have established that my include files live in "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.15.26726\include" because I can actually see them listed there. However, I get an error with the line #include <cstdio> .

I have tried right click on project name to bring up a context from which I chose 'Properties'. From the "Solution Project1 Property Pages", I selected "Debug Source Files" and then entered the full directory path to the include files.

I still get the error

Answer 1

You need to add the directory where the headers are found to the project properties under either C/C++ -> Additional include directories or VC++ -> Include directories.

And note that you need to make sure that the directory is added for all project configurations/platforms you wish to be able to build. The Debug source files item is only so that files can be found when running the debugger and have nothing to do with the project build stage.

Answer 2

I ran Visual Studio Installer and noted that one of the workloads, 'Desktop development with C++' had not been activated. After activating it and downloading the required or missing binaries, I am now able to create an empty project using an example of the quintessential 'Hello World' program such as #include int main(){printf("Hello, world");return 0;}

Answer 3

#include <cstdio> is part of the C++ Standard Library headers, if you are getting the error E1696: 'cannot open source file , you might have to retarget the solution/project. Do the following:

1. Right-click the Solution in the Solution Explorer pane;
2. Retarget solution;
3. Follow the steps/press OK.

It worked for me when I couldn't find Standard Library headers, hopefully, it works for you as well.