altrko's blog

Unreasonable error in Vscode.
By altrko, history, 2 months ago, In English

I am using C++ and as we all know we have this function __gcd(a,b). but for some reason using this was giving me error. So I thought it was my c++ version and changed it in Vscode. So now it shows in Vscode that i have that new version but when i run the program in terminal (there is a specific program which tells the version of c++ you are using in Vscode, i'll put link below) it still shows me old version that I was using. Therefore i still have same error. Pls someone help.

heres link: https://coderslegacy.com/c/check-cpp-compiler-version/

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2 months ago, # |
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Can you send your code here?

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    2 months ago, # ^ |
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    there is nothing to send i just say cout <<__gcd(3,5); and its giving me error

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      2 months ago, # ^ |
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      all the code and all the included libraries.

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        2 months ago, # ^ |
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        // this is code

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define N (int) 2e5
#define mod (ll) 1e9+7

ll aa[N],ans;

int main ()
{
    
    ios::sync_with_stdio(false);
	cin.tie(NULL);cout.tie(NULL);

	cout <<__gcd(3,4)<<endl;


}
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2 months ago, # |
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Are you using #include cmath?

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2 months ago, # |
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Which compiler do you use? For example MSVC doesn't have it

Anyways you can just use std::gcd

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    2 months ago, # ^ |
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    i don't know i haven't changed anything since downloading c++ on vscode. it still give me error when i use std::gcd(a,b) like howw

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      2 months ago, # ^ |
      ← Rev. 2   Vote: I like it +5 Vote: I do not like it

      Please don't “download c++ on vscode” unless you know clearly what programs are installed. Just get to know more about different compilers and choose one to install on your machine. Sometimes a shortcut may bring you more pain afterward.

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2 months ago, # |
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__gcd(a,b) is a compiler-specific extension and may not be available in all environments.

Use gcd(a,b) instead, from #include <numeric>.

std::gcd is part of the C++17 standard, making it portable and reliable across different compilers.

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    2 months ago, # ^ |
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    it sill gives me same error

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      2 months ago, # ^ |
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      Could you please add the error message here.

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        2 months ago, # ^ |
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        ./AA.cpp:23:7: error: use of undeclared identifier '__gcd' d = __gcd(a,b);

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        2 months ago, # ^ |
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        Error Messege while you are using gcd(3,4) please

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          2 months ago, # ^ |
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          it doesn't show me anything else just that on terminal

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2 months ago, # |
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contact saini_84 for vs code issues , contact number — 9381796116

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