working wt file

#include <iostream>
#include <fstream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <cstdlib>
using namespace std;

//objek pelanggan
struct pelanggan{
    string nama;
    int saldo,
        no;
    //constructor pelanggan
    pelanggan(){
      }
    pelanggan(int x,int y){
    no = x;
    saldo =y;
    }

    //operator overloading
    bool operator> (pelanggan x){
        return (x.saldo > saldo?true : false);
    }
    bool operator== (int x){
        return (saldo==x ? true : false);
    }
};

//vector customer untuk menyiman data utama
//vecto customer_tmp untuk menyimpan data sementara
vector <pelanggan> customer;
vector <pelanggan> customer_tmp;

//PROSEDUR DAN FUNGSI
void menu();
void baca_txt_file();
void tulis_txt_file();
void input_member();
void tampil_member(vector <pelanggan>);
void searching();
int binarySearch(int);
int seqSearch_urut_nonsentinel(int);
int seqSearch_belum_urut_nonsentinel(int);
int seqSearch_urut_sentinel(int);
int seqSearch_belum_urut_sentinel(int);
vector <pelanggan> cari_nama(vector <pelanggan>,string);
vector <pelanggan> bubble_sort(vector <pelanggan>);
vector <pelanggan> selection_sort(vector <pelanggan>);

int main(){
    baca_txt_file();
    menu();
    tulis_txt_file();
    return 0;
}

void menu(){
    char yn = 'y';
    system("cls");
    do{
    cout<<"Selamat Datang"<<endl;
    int pilih;
    char yn;
    cout<<"1. Tampil member "<<endl;
    cout<<"2. Tambah member "<<endl;
    cout<<"3. Cari member "<<endl;
    cout<<"4. Urutkan Data"<<endl;
    cout<<"5. keluar"<<endl;
    cout<<"masukan pilihan : ";
    cin>>pilih;
    switch(pilih){
    case 1:
        system("cls");
        tampil_member(customer);
        cout<<"kembali ? <y/n>";cin>>yn;
        if(yn == 'y')
            menu();
        break;
    case 2:
        system("cls");
        input_member();
        cout<<"kembali ? <y/n>";cin>>yn;
        if(yn == 'y')
            menu();
        break;
    case 3:
        system("cls");
        searching();
        cout<<"kembali ? <y/n>";cin>>yn;
        if(yn == 'y')
            menu();
        break;
    case 4:
        system("cls");
        cout<<"Urutkan Jumlah Pembayaran terbanyak "<<endl;
        cout<<"1. Urutkan dengan metode Bubble sort "<<endl;
        cout<<"2. Urutkan dengan metode Selection short "<<endl;
        cout<<"pilih";cin>>pilih;
        pilih == 1 ? tampil_member(bubble_sort(customer)) : tampil_member(selection_sort(customer));
        cout<<"kembali ? <y/n>";cin>>yn;
        if(yn == 'y')
            menu();
        break;
    case 5 :
        cout<<"keluar <y/n> ";cin>>yn;

        break;
    }
    }

    while(yn == 'n');
}
//prosedur untuk input member
void input_member(){
    char yn='y';
    while(yn=='y'){
        pelanggan tmp;
        cout<<"nama : ";
        cin>>tmp.nama;
        cout<<"saldo : ";
        cin>>tmp.saldo;
        tmp.no = customer.size()+1;
        customer.push_back(tmp);
        cout<<"masukan member lagi ? <y/n>";
        cin>>yn;
        if(yn=='n'){
            break;
        }
    }
}
//prosedur untuk output member
//parameter vector x
void tampil_member(vector <pelanggan> x){
    cout<<"--------------------------------------"<<endl;
    cout<<"| NO  |      NAMA       |    SALDO   |"<<endl;
    cout<<"--------------------------------------"<<endl;
    for(int i =0; i<x.size(); i++){
        cout<<setw(3)<<x[i].no<<setw(18-x[i].nama.length());
        cout<<x[i].nama<<setw(17)<<x[i].saldo<<endl;
    }
    cout<<"--------------------------------------"<<endl;
}

void searching(){
int pilih,target;
string nama;
cout<<"Pencarian "<<endl;
cout<<"1. Cari berdasarkan nomor"<<endl;
cout<<"2. Cari berdasarkan nama"<<endl;
cout<<"3. Cari berdasarkan saldo"<<endl;
cout<<"masukan pilihan : ";cin>>pilih;
switch(pilih){
case 1 :
    system("cls");
    cout<<"Pencarian berdasarkan nomor"<<endl;
    cout<<"1. Binary search "<<endl;
    cout<<"2. Sequential terurut non sentinel"<<endl;
    cout<<"3. Sequential terurut sentinel"<<endl;
    cout<<"masukan pilihan ";cin>>pilih;
    cout<<"masukan nomor yang dicari : ";cin>>target;
    switch(pilih){
    case 1 :
        if(binarySearch(target)!=-1){
        customer_tmp.push_back(customer[binarySearch(target)]);
        tampil_member(customer_tmp);
        customer_tmp.erase(customer_tmp.begin());
        }
        else{
            cout<<"data not found";
        }
        break;
    case 2:
        if(seqSearch_urut_nonsentinel(target)!=-1){
        customer_tmp.push_back(customer[seqSearch_urut_nonsentinel(target)]);
        tampil_member(customer_tmp);
        customer_tmp.erase(customer_tmp.begin());
        }
        else{
            cout<<"data not found";
        }
        break;
    case 3 :
        if(seqSearch_urut_sentinel(target)!=-1){
        customer_tmp.push_back(customer[seqSearch_urut_sentinel(target)]);
        tampil_member(customer_tmp);
        customer_tmp.erase(customer_tmp.begin());
        }
        else{
            cout<<"data not found";
        }
        break;
    }
    break;
case 2 :
    system("cls");
    cout<<"Cari berdasarkan nama"<<endl;
    cout<<"masukan nama : ";cin>>nama;
    if (cari_nama(customer_tmp,nama).size() > 0)
    tampil_member(cari_nama(customer_tmp,nama));
    else
    cout<<"not found"<<endl;
    customer_tmp.erase(customer_tmp.begin(),customer_tmp.end());
    break;
case 3:
    system("cls");
    cout<<"Pencarian berdasarkan saldo"<<endl;
    cout<<"1. Sequential tak terurut non sentinel"<<endl;
    cout<<"2. Sequential tak terurut sentinel"<<endl;
    cout<<"masukan pilihan : ";cin>>pilih;
    cout<<"masukan jumlah transaksi yang dicari : ";cin>>target;
    switch(pilih){

        case 1 :
        if(seqSearch_belum_urut_nonsentinel(target)!=-1){
        customer_tmp.push_back(customer[seqSearch_belum_urut_nonsentinel(target)]);
        tampil_member(customer_tmp);
        customer_tmp.erase(customer_tmp.begin());
        }
        else{
            cout<<"data not found";
        }
        break;
        case 2 :

        if(seqSearch_belum_urut_sentinel(target)!=-1){
        customer_tmp.push_back(customer[seqSearch_belum_urut_sentinel(target)]);
        tampil_member(customer_tmp);
        customer_tmp.erase(customer_tmp.begin());
        }
        else{
            cout<<"data not found";
        }
        break;
    }
    break;
 }
}

//fungsi binary search
//return posisi data ditemukan
//return -1 jika data tidak ada
int binarySearch(int target){
    int i=0,awal=0, akhir= customer.size(), tengah;
    bool ketemu;

    while(!ketemu & i<=customer.size()){
        tengah = (awal+akhir)/2;
        if(customer[tengah].no == target)
        ketemu = true;
        else
            if(customer[tengah].no>target)
                akhir = tengah -1;
            else
                awal = tengah + 1;
    }
    return ( ketemu ? tengah : -1);
};


int seqSearch_belum_urut_nonsentinel(int target){
    bool ketemu;
    int i;
    for (i =0; i<customer.size();i++){

        if(customer[i] == target){
            ketemu = true;
            break;
        }
    }
    return  ( ketemu ? i : -1);

}

//fungsi sequential search  belum urut sentinel
//return posisi data ditemukan
//return -1 jika data tidak ada
int seqSearch_urut_nonsentinel(int target){
    bool ketemu;
    int i;
    for (i =0; i<customer.size();i++){
        if(customer[i].no == target){
            ketemu = true;
            break;
        }
        if(target<customer[i].no)
            break;
    }
    return  ( ketemu ? i : -1);
}

//fungsi urut non sentinel
//return posisi data ditemukan
//return -1 jika data tidak ada
int seqSearch_urut_sentinel(int target){
    pelanggan batas(customer.size()+1,0);
    customer.push_back(batas);
    int i=0;
    for(int i =0;i<customer.size()-1;i++){
        if(customer_tmp[i].no==target)
            break;
        if(customer_tmp[i].no>target)
            break;
    }
    customer.erase(customer.end()-1,customer.end());
    return (i>customer.size() ? -1 : i);
}

//fungsi sequential urut sentinel
//return posisi data ditemukan
//return -1 jika data tidak ada

int seqSearch_belum_urut_sentinel(int target){
    pelanggan batas(customer.size()+1,0);
    customer_tmp.swap(customer);
    customer_tmp.push_back(batas);
    int i=0;
    for(int i =0;i<customer_tmp.size();i++){
        if(customer_tmp[i].saldo==target)
            break;
    }
    customer_tmp.erase(customer_tmp.begin(),customer_tmp.end());
    return (i<customer_tmp.size()-1 ? i : -1);
}

//fungsi sorting sengan bubble sort
//parameter fungsi vector data
//return vector dengan tipe pelanggan terurut ascending
vector <pelanggan> bubble_sort(vector <pelanggan> data ){
    pelanggan x;
    for(int i =0;i < data.size();i++){
        for(int j =0; j < data.size() -1 -i;j++){
        if (data[j]>data[j+1] ){
                swap(data[j],data[j+1]);
        }
      }
    }
    return data;
}

//fungsi sorting sengan selection sort
//parameter fungsi
//return vector dengan tipe pelanggan terurut ascending
vector <pelanggan> selection_sort( vector <pelanggan>  data){
    int posisi,i;
    pelanggan tmp;
        for(posisi = 0 ; posisi<data.size();posisi++){
            for( i = posisi + 1; i<data.size(); i++){
                if(data[posisi].saldo> data[posisi+1].saldo){
                    swap(data[posisi],data[posisi+1]);
                }
            }
        }
            return data;
}

//fungsi sorting sengan bubble sort
//parameter fungsi vector data
//return vector dengan tipe pelanggan terurut ascending
vector <pelanggan> cari_nama(vector <pelanggan> data, string nama){
    for(int i =0;i<customer.size();i++){
        if(nama==customer[i].nama){
            data.push_back(customer[i]);
        }
    }
    return data;
};

//prosedur untuk membaca data dari txt file
// data disiman ke vector customer
void baca_txt_file(){
    pelanggan tmp;
    ifstream fileku_input;
    fileku_input.open("test.txt");
    if(fileku_input.is_open()&&fileku_input.peek()!=fileku_input.eof()){
        while(!fileku_input.eof()){
            fileku_input>>tmp.no>>tmp.nama>>tmp.saldo;
            customer.push_back(tmp);
        }
        if(customer.size()>0)
            customer.erase(customer.end());
    }
    else{
        cout<<"file tidak dibuka"<<endl;
    }
}

//prosedur untuk menulis data ke txt file
// data disiman ke test.txt
void tulis_txt_file(){
    ofstream fileku;
    fileku.open("test.txt");
    if(fileku.is_open()){
        for(int i =0; i<customer.size(); i++){
            fileku<<customer[i].no<<" "<<customer[i].nama<<" "<<customer[i].saldo<<endl;
        }
    }
    else{
        cout<<"file tidak dibuka"<<endl;
    }
    fileku.close();
}