#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    char kelas, lagi;
    unsigned long ubay, kmb;
    string kopes, napes;
    unsigned long harga=0,tobay;
    int jutik;
    awal:
    cout<<"PROGRAM TIKET PESAWAT"<<endl;
    cout<<"JAKARTA-MALAYSIA"<<endl;

    cout<<"--------------------------------------\n";
    cout<<"masukan kode pesawat [MPT/GRD/BTV] :";cin>>kopes;
    cout<<"kelas pesawat\n"
    <<"1. Excekutif\n"
    <<"2. Bisnis\n"
    <<"3. Ekonomi\n";
    cout<<"pilih kelas [1/2/3]: ";  cin>>kelas;
    cout<<endl;

    for (int ijk = 0; ijk < kopes.length(); ijk++) {
        kopes[ijk] = tolower(kopes[ijk]);
    }

    if (kopes=="mpt") {
        napes="MERPATI";
        if(kelas=='1') {
            harga=1500000;
        } else if(kelas=='2') {
            harga=900000;
        } else if(kelas=='3') {
            harga=500000;
        }
    }

    if (kopes=="grd") {
        napes="GARUDA";
        if(kelas=='1'){
            harga=1200000;
        } else if(kelas=='2') {
            harga=800000;
        } else if(kelas=='3') {
            harga=400000;
        }
    }
    if (kopes=="btv") {
        napes="BATAVIA";
        if(kelas=='1'){
            harga=1000000;
        } else if(kelas=='2') {
            harga=700000;
        } else if(kelas=='3') {
            harga=300000;
        }
    }

    cout<<"nama pesawat: " << napes << endl;
    cout<<"harga tiket:  " << harga << endl;
    cout<<"masukan jumlah tiket : "; cin>>jutik;
    tobay= harga * jutik;
    cout<<"total bayar\t:"<<tobay<<endl;
    cout<<"uang bayar\t :";cin>>ubay;
    kmb=ubay-tobay;
    cout<<"kembalian\t :"<<kmb<<endl;

    cout<<"input data lagi [Y/T]:";cin>>lagi;

    if(lagi=='Y'|| lagi=='y')
        goto awal;
}