Visual Studio Code c++11 extension warning - c++

Question

I am in the process of learning c++ and I'm using visual studio code for Mac. I use Code Runner to run my program. My problem is that when I use something from c++11 like "auto" for variable declaration, visual studio code gives me a warning like this, but if I try running it on Xcode or Eclipse it doesn't:
warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
for(auto y: nstrVec)
This is the program if it's necessary:
#include <iostream>
#include <cstdlib>
#include <string>
#include <vector>
#include <numeric>
#include <sstream>
int main(){
std::vector<std::string> nstrVec(10);
std::string str("I'm a string");
nstrVec[0] = str;
std::cout << str.at(0) << "\n";
std::cout << str.front() << " " << str.back() << "\n";
std::cout << "Length " << str.length() << "\n";
// copies all characters after the fourth
std::string str2(str, 4);
for(auto y: nstrVec)
if(y != "")
std::cout << y << "\n";
return 0;
}
And this is the c_cpp_proprerties.json file:
{
"configurations": [
{
"name": "Mac",
"includePath": [
"${workspaceFolder}/**",
"/System/Library/Frameworks/Kernel.framework/Versions/A/Headers"
],
"defines": [],
"macFrameworkPath": [
"/System/Library/Frameworks",
"/Library/Frameworks"
],
"compilerPath": "/usr/bin/clang",
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "clang-x64"
}
],
"version": 4
}

Answer 1

In VS Code:
File>>Preference>>Settings>>Extensions
find C_Cpp>Default:Cpp Standard drop down menu
set that to c++11

Answer 2

I spent so long today trying to figure out why I was getting this error and no where had the exact answer I required so I thought I'd post it here just in case I can save anyone the hassle.
If you're using code runner, look in user settings and set:
"code-runner.executorMap" : { "cpp" : "cd $dir && g++ -std=c++17 $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt" }
The pertinent bit being "g++ -std=c++17".
This is providing of course you can compile your programme in shell using Daniel's solution above but not in VScode + and using code runner.

Answer 3

I had the same problem, but solved it using set vscode-user-settings <>
"clang.cxxflags": ["-std=c++14"]

Answer 4

I used this to solve my problem. Open your terminal
bash
echo "alias g++='g++ -std=c++17'" >> ~/.bashrc
source ~/.bashrc
zsh
echo "alias g++='g++ -std=c++17'" >> ~/.zshrc
source ~/.zshrc

Answer 5

For everyone who comes to this question to find a quick answer (like I did):
The following compiler command should compile your program main.cpp with the latest C++ standard (c++17) and should get rid of warning messages like the one described above:
g++ -std=c++17 -g main.cpp -o main
It is mentioned multiple times in the comments, but I think this question should have a regular answer.

Answer 6

If you're using CPH judge extension in VS add -std=c++11 in Cph › Language › Cpp: Args in extension settings

Answer 7

If you're using CPH, add this line to Cph >> Language >> Cpp: Args
-std=c++17
If it doesn't work for you, also go to File >> Preference >> Settings >>
Extensions >> C_Cpp >> Default:Cpp_Standard and set that to c++17

Answer 8

None of the answers here worked for me on Mac that were entirely within VSCode (I didn't want to modify my .zshrc file).
What did work though, was adding argument --std=c++20 for the clangd: Fallback Flags under Extensions > clangd, then restarting VSCode.

Answer 9

Fix for MAC + code runner.
Select Code -> Settings -> Settings
In the search prompt, seach "code-runner":
Click on "Edit settings.json"
Look for a field called "code-runner.executorMap" -> "cpp"
After g++, add the following to it " -std=c++17 ". In other words, the line should look something like this:
"cpp": "cd $dir && g++ -std=c++17 $fileName -o $fileNameWithoutExt &&
$dir$fileNameWithoutExt"
Close VSCode, and open it again.