function

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#ifndef _MYLIST_H_
#define _MYLIST_H_

#include<iostream>
#include<string>
#include <fstream>
#include <ostream>
#include <stdlib.h>
#include <vector>
#include <string.h>

using namespace std;

struct snode {
   string name;
   string target;
   int quantity;
};
enum Order {
   ITEM,
   CUSTOMER
};
class mylist {
   private:
       vector<snode>INV;
       vector<snode>SALE;
   public:


       mylist();

       void insert(string name,string target,int quantity,Order order);
       void remove(string name);
       void readFile(string fileName);
       void saveFile(string fileName,Order order);
       void outputFile(string fileName);
};

#endif

#include "mylist.h"
mylist::mylist() {

}

void mylist::insert(string name,string target,int quantity,Order order) {
    snode temp;
    temp.name = name;
    temp.target = target;
    temp.quantity = quantity;

    if(order==ITEM) {
        INV.push_back(temp);
    }

    else if(order==CUSTOMER) {
        SALE.push_back(temp);
    }

}

void mylist::remove(string name) {

}
void mylist::readFile(string fileName) {
    string operator_;
    string name_;
    string target_;
    int quantity_;

    ifstream file(fileName.c_str());
    string word;

    /*
    while(!file.eof()){
        file>>word;
        cout<<word<<endl;
    }
    */

    while(getline(file,word)) {
        //cout<<word<<endl;

        operator_ = word[0];
        //cout<<operator_<<endl;

        //load name
        int namepos=2;
        int cnt=0;
        while(word[cnt+2]!='#') {
            cnt++;
        }

        string temp = word;
        name_= temp.substr(namepos,cnt);
        //cout<<name_<<endl;

        //load target


        int targetpos = cnt+3;
        int cnt2=targetpos;

        while(word[cnt2]!='#'&&cnt2<=word.length()) {
            //cout<<word[cnt2]<<" ";
            cnt2++;
        }

        target_ = word.substr(targetpos,cnt2-targetpos);
        //cout<<target_<<endl;

        //load quantity
        if(word[cnt2]=='#') {

            int quantitypos = cnt2+1;
            int cnt3 = quantitypos;

            string quantityStr = word.substr(quantitypos);
            //string to int

            quantity_ = atoi(quantityStr.c_str());
            //cout<<quantity_<<endl;


        }

        else {
            quantity_=0;
        }
        cout<<endl;


        //Buy
        if(operator_=="B") {
            insert(name_,target_,quantity_,ITEM);
        }

        else if(operator_=="S") {
            insert(name_,target_,quantity_,CUSTOMER);
        }


        else if(operator_ =="R") {
            remove(name_);
        }
    }
}


void mylist::saveFile(string fileName,Order order) {
    //save file
    ofstream file(fileName.c_str());
    string word;

    if(order == ITEM) {
        for(int i=0; i<INV.size(); i++) {
            //char* qStr;
            //itoa(INV[i].quantity,qStr,10);
            //char* qs;
            //sprintf(qs, "%d", INV[i].quantity);
            //cout<<qs;
            word = INV[i].name+"#"+INV[i].target+"#";
            file<<word<<INV[i].quantity<<endl;
        }
    }

    else if(order == CUSTOMER) {
        for(int i=0; i<SALE.size(); i++) {

            //char* qStr;
            //itoa(SALE[i].quantity,qStr,10);
            //char* qs;
            //sprintf(qs, "%d", SALE[i].quantity);
            word = SALE[i].name+"#"+SALE[i].target+"#";
            file<<word<<SALE[i].quantity<<endl;
        }
    }

}

void mylist::outputFile(string fileName) {
    ifstream file(fileName.c_str());
    string word;
    while(getline(file,word)) {
        cout<<word<<endl;
    }
}

#include "mylist.h"

int main() {
    mylist Inventory;
    mylist Sale;

    string totalchoice;
    string transdata;
    string invdata;
    string salesdata;
    
    cout<<"SHOW TOTAL DATA?(YES|NO)"<<endl;
    cin>>totalchoice;
    
    if(totalchoice=="YES")
        Sale.outputFile("testdata.txt");
        
    cout<<endl<<"Enter the Buys report filename: ";
    cin>>invdata;
    Inventory.readFile("testdata.txt");
    Inventory.saveFile(invdata,ITEM);
    Inventory.outputFile(invdata);
    
    cout<<endl<<"Enter the Sales report filename: ";
    cin>>salesdata;
    Sale.readFile("testdata.txt");
    Sale.saveFile(salesdata,CUSTOMER);
    Sale.outputFile(salesdata);




}