Eclipse C++: Symbol 'std' could not be resolved

Question

I am getting this error in the TestExecute.cpp -

\"Symbol \'std\' could not be resolved\"

CODE

#include 

        

Answer 1

Try out this step: https://www.eclipse.org/forums/index.php/t/636348/

Go to

Project -> Properties -> C/C++ General -> Preprocessor Include Paths, Macros, etc. -> Providers

• Activate CDT GCC Built-in Compiler Settings
• Deactivate Use global provider shared between projects
• Add the command line argument -std=c++11.

Answer 2

The includes folder in the project is probably missing /usr/include/c++. Goto your project in project explorer, right click -> Properties -> C\C++ Build -> Environment -> add -> value= /usr/include/c++. Restart eclipse.

Answer 3

Install C++ SDK:

Help > Install New Software > Work with: path for your eclipse version > search for C++ and install C++ sdk development tools.

Example for a path: Mars - http://download.eclipse.org/releases/mars

Answer 4

The problem you are reporting seems to me caused by the following:

1. you are trying to compile C code and the source file has .cpp extension
2. you are trying to compile C++ code and the source file has .c extension

In such situation Eclipse cannot recognize the proper compiler to use.

Answer 5

You can rewrite the code likes this:

#include<iostream>
#include<stdio.h>

using namespace std;

Answer 6

For MinGW this worked for me:

• Right click project, select Properties
• Go to C/C++ General - Paths and Symbols - Includes - GNU C++ - Include directories
• Select Add...
• Select Variables...
• Select MINGW_HOME and click OK
• Click Apply and OK

You should now see several MinGW paths in Includes in your project explorer.
The errors may not disappear instantly, you may need to refresh/build your project.

---

If you are using Cygwin, there could be an equivalent variable present.