Contact Management by bits

#include<iostream>
#include<fstream>
#include<stdio.h>
#include<utility>
#include<string>
#include<vector>

using namespace std;
void insert_contact();
void search_contact();
void upORdel(string x);
void update_contact(string outputName, string outputLine, vector<string>output);
void delete_contact(string outputName, string outputLine);
void view_all_contact();

char  f1[]="file1.txt", f2[]="file2.txt";

int main()
    {
    while(1)
    {

    system("cls");
    system("color A1");
    cout<<"\t\t\t\t\t:::WELCOME TO CONTACT MANAGEMENT APPLICATION:::"<<endl;
    cout<<"\t\t\t\t\t\t\t\t\tCreated by Bits"<<endl<<endl<<endl;
    int c;
    cout<<":::Choice your option:::"<<endl<<endl<<endl;
    cout<<"Type 1 for insert contact."<<endl;
    cout<<"Type 2 for search contact."<<endl;
    cout<<"Type 3 for view all contact."<<endl;
    cin>>c;
    switch(c)
    {
   case 1:
        insert_contact();
    break;
    case 2:
        search_contact();
    break;
    case 3:
        view_all_contact();
    break;
    default:
        cout<<"Entered wrong key"<<endl;
    break;
    }
    }
    return 0;
}
void insert_contact()
{
    system("color D1");

    ofstream FILE;
    FILE.open(f1, ios::app);
    cout<<endl<<"Enter User name: ";
    string x;
    getchar();
    getline(cin, x);
    FILE<<endl<<"#"<<x;

    cout<<"Phone number: ";
    cin>>x;
    FILE<<endl<<x<<"^";


    cout<<"Email address: ";
    cin>>x;
    FILE<<x<<"^";


    cout<<"Address: ";
    cin>>x;
    FILE<<x<<"^"<<endl;

    x.clear();
    FILE.close();
    cout<<endl<<endl<<"User info inserted"<<endl<<endl;
    again:
    cout<<endl<<endl<<"For Home page press home."<<endl;
    string h;
    cin>>h;
    if(h=="home"||h=="HOME"||h=="Home")
    {
        system("cls");
        return;
    }
    else {
        cout<<"Wrong key pressed"<<endl;
        goto again;
    }

}
void search_contact()
{
    system("color B1");
    ifstream FILE;
    FILE.open(f1);
    cout<<"User Name: ";
    string x="#", data, extra;
    getchar();
    getline(cin, extra);
    x.append(extra);
    bool flag=false;

    while(!FILE.eof())
    {
        getline(FILE, data);
        if(x==data)
            {
                flag=true;
                upORdel(x);
                break;
            }
    }
    if(!flag)
    cout<<"Contact not found"<<endl;
    FILE.close();
}
void upORdel(string x)
{

    ifstream FILE;
    FILE.open(f1);
    string data, extra, ex, exx;
    vector<string>output;
    while(!FILE.eof())
    {
        getline(FILE, data);
        if(x==data)
            {
                extra.assign(x, 1, x.size());
                output.push_back(extra);

                getline(FILE, extra);

                int s=0, k=0;
                for(int i=0;i<extra.size();i++)
                {
                    if(k==0) k++;
                    else if(k==2) k++;
                    else if(k==4) k++;

                    if(extra[i]=='^')
                    {
                        k++;
                        output.push_back(ex);
                        ex.clear();
                    }
                    else
                    {
                        //cout<<extra[i];
                        exx=extra[i];
                        ex.append(exx);

                    }
                }
                break;
            }
    }
    FILE.close();
    int j=0;
    cout<<":::Searched result:::"<<endl;
    for(auto&i:output)
    {
        //cout<<"x"<<endl;
        if(j==0) cout<<"User Name: ", j++;
        else if(j==1) cout<<"Contact Number: ", j++;
        else if(j==2) cout<<"Email Number: ", j++;
        else if(j==3)cout<<"Address: ", j++;
        cout<<i<<endl;
    }
    string outputName='#'+output[0];
    output.erase(output.begin());
    string outputLine;
    for(auto&i:output)
        outputLine.append(i+'^');
    up:
    cout<<endl<<endl<<":::Choice your option:::"<<endl;
    cout<<"Press 1 for update"<<endl;
    cout<<"Press 2 for delete the contact"<<endl;
    cout<<"Press 3 for going home"<<endl;
    cout<<"Choose: ";
    int c;
    cin>>c;
    switch(c)
    {
    case 1:
        update_contact(outputName, outputLine, output);
    break;
    case 2:
        delete_contact(outputName, outputLine);
    break;
    case 3:

            system("cls");
            return;
    break;
    default:
        {
            cout<<"Sorry! you've entered a wrong key."<<endl;
            cout<<"Try again."<<endl;
            goto up;
        }
    break;
    }



}
void update_contact(string outputName, string outputLine, vector<string>output)
{
    vector<string>updatevec(3);
    string x, updateName;

    cout<<":::Update:::"<<endl;
    cout<<"For not making change in a specific filed just type null"<<endl;
    for(int i=0;i<4;i++)
    {
        if(i==0)
        {
            cout<<"New name: ";
            getchar();
            getline(cin, x);
            if(x.compare("NULL")!=0&&x.compare("null")!=0&&x.compare("Null")!=0)
                updateName='#'+x;
            else updateName=outputName;
        }
        else if(i==1)
        {
            cout<<"New Contact Number: ";
            getline(cin, x);
            if(x.compare("NULL")!=0&&x.compare("null")!=0&&x.compare("Null")!=0)
                updatevec[0]=x+'^';
            else updatevec[0]=output[0]+'^';
        }
        else if(i==2)
        {
            cout<<"New Email Address: ";
            getline(cin, x);
            if(x.compare("NULL")!=0&&x.compare("null")!=0&&x.compare("Null")!=0)
                updatevec[1]=x+'^';
            else updatevec[1]=output[1]+'^';
        }
        else if(i==3)
        {
            cout<<"New Address: ";
            getline(cin, x);
            if(x.compare("NULL")!=0&&x.compare("null")!=0&&x.compare("Null")!=0)
                updatevec[2]=x+'^';
            else updatevec[2]=output[2]+'^';
        }
    }
    string updateInfo;
    for(auto&i:updatevec)
        updateInfo.append(i);


    cout<<"Make change?"<<endl;
    cout<<"Type yes/no"<<endl;
    cout<<"Choose: ";
    getline(cin, x);
    //cout<<"Change able Name: "<<updateName<<endl;
    //cout<<"Change able info: "<<updateInfo<<endl;
    if(x.compare("YES")==0||x.compare("yes")==0||x.compare("Yes")==0)
    {

        fstream FILE(f1);
        ofstream FILEx(f2);
        //temp.open(f2, ios::out);
        string line;
        while(!FILE.eof())
        {

            if(line==outputName)
            {
                FILEx<<updateName<<endl;
                getline(FILE, line);
                FILEx<<updateInfo<<endl;
            }
            else FILEx<<line<<endl;
            getline(FILE, line);
        }

        FILE.close();



        ofstream file(f1, ios::trunc);
        ifstream reRight(f2);
        string extra;
        while(!reRight.eof())
        {
            file<<extra<<endl;
            getline(reRight, extra);
        }
        reRight.close();
        FILEx.close();
        ofstream file2(f2, ios::trunc);
        file2.close();

    }

}
void delete_contact(string outputName, string outputLine)
{
    cout<<"Are you sure to delete this contact?"<<endl;
    cout<<"Type yes/no."<<endl;
    cout<<"Choose: ";
    string x;
    cin>>x;
    if(x=="yes")
    {
        fstream FILE(f1);
        ofstream FILEx(f2);

        string line;
        while(!FILE.eof())
        {

            if(line==outputName)
            {
                FILEx<<""<<endl;
                getline(FILE, line);
                FILEx<<""<<endl;
            }
            else FILEx<<line<<endl;
            getline(FILE, line);
        }

        FILE.close();



        ofstream file(f1, ios::trunc);
        ifstream reRight(f2);
        string extra;
        while(!reRight.eof())
        {
            file<<extra<<endl;
            getline(reRight, extra);
        }
        reRight.close();
        FILEx.close();
        ofstream file2(f2, ios::trunc);
        file2.close();
    }
}
void view_all_contact()
{
    system("color E1");
    vector<pair<string, vector<string> > >OutputData;
    ifstream FILE(f1);
    string str, x;
    vector<string>vec;
    string ex1, ex2;

    while(!FILE.eof())
    {
        if(str[0]=='#')
        {

            ex1.assign(str, 1, str.size());
            getline(FILE, str);
            for(int i=0;i<str.size();i++)
            {
                if(str[i]=='^') vec.push_back(x), x.clear();
                else x+=str[i];
            }

            OutputData.push_back(make_pair(ex1, vec));
            ex1.clear();

            vec.clear();
        }
        getline(FILE, str);
    }
    FILE.close();
    //sorting
    string extra;
    vector<string>xvec;

    for(int i=1;i<OutputData.size();i++)
    {
        for(int j=1;j<OutputData.size();j++)
        {
            if((OutputData[j-1].first).compare(OutputData[j].first)>0)
            {
                extra=OutputData[j-1].first;
                xvec=OutputData[j-1].second;

                OutputData[j-1]=OutputData[j];

                OutputData[j].first=extra;
                OutputData[j].second=xvec;

            }
        }
    }
    system("cls");
    cout<<endl<<endl<<":::All User Info:::"<<endl;
    int user=0;
    for(auto&i:OutputData)
    {
        cout<<endl<<user+1<<". User Name: "<<i.first<<endl, user++;
        vec=i.second;
        int x=0;
        for(auto&j:vec)
            {
                if(x==0) cout<<"Contact Number: ", x++;
                else if(x==1) cout<<"Email Address: ", x++;
                else if(x==2) cout<<"Address: ", x++;
                cout<<j<<endl;
            }
        cout<<endl;
    }
    again:
    cout<<endl<<endl<<"For Home page press home."<<endl;
    string h;
    cin>>h;
    if(h=="home"||h=="HOME"||h=="Home")
    {
        system("cls");
        return;
    }
    else {
        cout<<"Wrong key pressed"<<endl;
        goto again;
    }
}