Categorize.cpp

#include <iostream>
#include <map>
#include <vector>
#include <string>

using namespace std;

struct Entry {
    int id;
    string category;
    string field;
    Entry(int _id, string _category, string _field) {
        id = _id;
        category = _category;
        field = _field;
    }
};

int main() {
    
    vector<Entry*> entries = vector<Entry*>();
    int total = 0;
    
    for (int i = 0; i < 20; i++ total++) {
        entries.push_back(new Entry(total, "Fruit", "Apple-"+i));
    }
    for (int i = 0; i < 20; i++ total++) {
        entries.push_back(new Entry(total, "Fruit", "Orange-"+i));
    }
    for (int i = 0; i < 20; i++ total++) {
        entries.push_back(new Entry(total, "Vegetable", "Brocolli-"+i));
    }
    for (int i = 0; i < 20; i++ total++) {
        entries.push_back(new Entry(total, "Startch", "Potato-"+i));
    }
    
    
    map<string, vector<Entry*>> catagories = map<string, vector<Entry*>>();
    
    for (int i = 0; i < entries.size(); i++) {
        if (categories.count(entries[i]->category) < 1) {
            categories.emplace(entries[i]->category, vector<Entry*>());
        }
        
        categories[entries[i]->category].push_back(entries[i]);
    }
}