#ifndef error : need to update includepath - c++

Question

My header file "broker.h" is
#ifndef _BROKER_
#define _BROKER_
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <list>
#include <iterator>
#include <vector>
#include "strategy.h"
#include "utils.h"
using namespace std;
class Broker{
private:
vector< vector<double> > buy_signals; //time X codes
vector< vector<double> > sell_signals; //time X codes
vector< vector<double> > positions; //time X codes
vector< vector<double> > cashs; //time X 1
vector< vector<double> > prices; // time X codes
vector<double> position;
fstream fs;
fstream indi;
vector<string>codes;
vector<string>time_index;
int n_cols, n_rows;
double return_mean, sharp;
Strategy strategy;
public:
double cash;
double unit;
template<typename T>
void set_data(vector<string>& _codes, const map<string, vector<T>>>& _fs, const map<string, vector<T>>>& _indi, const vector<vector<double>>& _prices, const vector<string>& _time_index){
codes = _codes;
time_index = _time_index; //2015-2020
n_cols = codes.size();
n_rows = time_index.size();
/*
I don't know which data type is better for multi-index columns
fs=_fs;
indi = _indi;
*/
buy_signals = zero_vector(buy_signals, n_rows, n_cols);
sell_signals = zero_vector(sell_signals, n_rows, n_cols);
positions = zero_vector(positions, n_rows, n_cols);
cashs = zero_vector(cashs, n_rows, 1);
prices = _prices;
vector<vector<double>> temp;
position = zero_vector(temp, 1, n_cols)[0];
};
void update_data(Strategy s, int date_index){
cash = s.cash;
position = s.position;
cashs[i] = s.cash; // times X 1 : vector< vector<int> >
positions[i] = s.position; // times X codes : vector<vector<int>>
buy_signals[i] = s.buy_signal;
sell_signals[i] = s.sell_signal;
};
void run(){
for (int i=0; i < n_rows ; i++) {
string date = time_index[i];
string year = date.substr(0,4);
string prev_year = to_string(stoi(year)-1);
// 추상적 데이터 접근 - fs 데이터 타입 정해진 후 수정 바람
prev_fs_row = fs[prev_year]; // Not exact fs data type
curr_fs_row = fs[year];
curr_indi_row = indi[date];
Strategy strat = Strategy();
strat.set_data(prev_fs_row, curr_fs_row, curr_indi_row, codes, unit, cash);
strat.run();
update_data(strat, i);
}
};
void performance(){
vector<double> last_price = prices.back(); // {vector<int>, vector<int>, ....}
vector<double> total_remain_num = position;
vector<vector<double>> total_buy_data = d2_vec_mul(prices, buy_signals);
vector<vector<double>> total_sell_data = d2_vec_mul(prices, sell_signals);
double total_buy = sum_vector(sum_vector(total_buy_data, 1))[0][0];
double total_sell = sum_vector(sum_vector(total_sell_data, 1))[0][0];
double total_remain = vec_mul(last_price, total_remain_num)[0];
double profit = total_sell + total_remain - total_buy;
if (total_buy) {
return_mean = profit/total_buy;
}
else{
cout << "No buy!" <<endl;
return;
}
int n_rows = time_index.size();
// prices : already change from na -> 0 (from python)
vector<vector<double>> posses_stock_value = sum_vector(d2_vec_mul(positions, prices), 1); // times X 1
vector<vector<double>> accumulates = sum_vectors(cashs, posses_stock_value);
vector<vector<double>> shift_accumulates = shift_vector(accumulates);
vector<vector<double>> daily_return = divide_vectors(sum_vectors(accumulates, shift_accumulates, 0), shift_accumulates);
vector<double> temp ={1}; vector<vector<double>> ones(n_rows, temp);
daily_return = sum_vectors(daily_return, ones, 0);
temp.clear();
temp.push_back(return_mean); vector<vector<double>> daily_return_mean(n_rows, temp);
vector<vector<double>> daily_Err = (sum_vectors(pop_front(daily_return), pop_front(daily_return_mean));
double SSE = sum_vector(d2_vec_mul(daily_Err, daily_Err));
double std = power_vector(SSE, 0.5);
sharp = return_mean / std;
}
};
#endif
And there is an error in #ifndef BROKER as "There is #include error. Please update includePath."
My c_cpp_properties.json is
My project folder location is
However, my includepath is correct and when I just a simple HelloWorld.cpp there is no error. Why is there an error in #ifndef??