vector <double> read_file(string path)
{
    ifstream file(path);
    string number;
    vector <double> num ={};
    if (!file.is_open())
    {
        cout<<"Fail to open the file!"<<endl;
    }
   
    while (!file.eof()){
        vector <double> num = {};
        getline(file,number,',');
        num.push_back(stod(number));
        
    }
    file.close();
    cout<<num.size() << " numbers loaded!" <<endl;
   
    return num;
}

我刚刚C++入门，写了这个读取CSV文件（文件为逗号分隔开的很多数字）并存储到vector里，报错说是linker有错误，但我搜了一下也不懂是什么，请前辈指点一下！