CODEWITHSUNDEEP
c++macos
thesmartdeveloper
thesmartdeveloper

Reputation: 65

error: non-aggregate type vector<int> cannot be inititalised with an initialiser list

I am writing C++ code in vs code on my Macbook. While using the C++ standard template library, i am writing the code

#include<iostream>
#include<vector>
using namespace std;
int main()
{
    vector<int> array={1,3,4};
    for(int x:array)
    cout<<x<<" ";
    return 0;
}

This code, on compilation gives the error that:

non-aggregate type vector<int> cannot be initialised with an initialiser list.

But when I re-write the code as below, it works totally fine. 

#include<iostream>
#include<vector>
using namespace std;
int main()
{
    vector<int> array;
    int val;
    int n;
    cout<<"Give me n:";
    cin>>n;
    for(int i=0;i<n;++i)
    {
        cin>>val;
        array.push_back(val);
    }
    return 0;
}

In addition, I tried doing this in JetBrains Clion IDE, and I see that both versions of my code are working fine. Why this problem is happening?

Upvotes: 3

Views: 2482

Answers (3)

Azwrith
Azwrith

Reputation: 1

I encountered this issue while working in VS Code, but not in CLion. The problem occurs because Code Runner's default C++ execution command uses g++ without specifying the standard version, which defaults to an older version (C++98 or C++03).

To fix this, open the Code Runner extension settings in settings.json and modify the "cpp" execution command. Change this line: "cpp": "cd $dir && g++ $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt" to "cpp": "cd $dir && g++ -std=c++17 $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt" This ensures that Code Runner compiles your C++ files using C++17, avoiding compatibility issues with modern code. If you need an even newer standard, you can replace -std=c++17 with -std=c++20 .

Upvotes: 0

yonghuster
yonghuster

Reputation: 11

It worked on my environment (VS Code on Mac) by adding "-std=c++11" into the "args" list in "tasks.json" under ".vscode" folder.

Upvotes: 1

OrenIshShalom
OrenIshShalom

Reputation: 7112

But when i write this same code as:

The other version is not really the same code.

Your problem is with std::vector initializer list, probably arising from wrong compilation flags passed to your compiler. If you're using mac, try to download and install clang, then compile and run it. If it dosen't work then re-post.

Upvotes: 3

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