Laporan mingguan 5 plug 3 upnvyk

#include <iostream>
using namespace std;
//xagusart

int main()
{

    int  mka[10],
         nilai[10];
    char nama[30],
         yn,
         kelas[10];
    int  nim,
         jum,
         x;
    bool rekam = true;


    ulang :
    cout<<"MENU"<<endl;
    cout<<"1. Rekam Data Mahasiswa"<<endl;
    cout<<"2. Cetak Data Mahasiswa"<<endl;
    cout<<"3. Keluar"<<endl;
    cout<<"Silakan masukan pilihan : ";cin>>x;
    switch(x){
    case 1:
    rekam = false;
    cout<<"rekam data mahasiswa"<<endl;
    cout<<"--------------------"<<endl;
    cin.ignore();
    cout<<"masukan nama   : ";cin.getline(nama,30);
    cout<<"masukan no mhs : ";cin>>nim;
    cout<<"Banyak MKA     : ";cin>>jum;
    cout<<endl<<"Petunjuk : Tekan tab ya untuk geser kolom"<<endl;
    cout<<"-----------------------------"<<endl;
    cout<<"| Kode MKA  |"<< " kelas |"<<" Nilai |"<<endl;
    cout<<"-----------------------------"<<endl;
      for(int i =0;i<jum;i++)
        {
            cout<<"| ";
            cin>>mka[i]>>kelas[i]>>nilai[i];
            cin.ignore();
        }
    cout<<"-----------------------------"<<endl;
    cout<<"kembali ke menu utama <y/n>";
    cin>>yn;
        if(yn=='y')
            goto ulang;
        else
            return 0;
    break;

    case 2:
     if(rekam)
        {
            cout<<"data belum direkam"<<endl;
            cout<<"silakan kembali ke menu utama <y/n>";
            cin>>yn;
            if(yn=='y')
                  goto ulang;
            else
                  return 0;
        }
    else
    {
    cout<<endl<<"Cetak data mahasiswa"<<endl;
    cout<<"No mahasiswa   : "<<nim<<endl;
    cout<<"Nama mahasiswa : "<<nama<<endl;
    cout<<"Jumlah MKA     : "<<jum<<endl;
    cout<<endl<<endl;
    cout<<"-----------------------------"<<endl;
    cout<<"| Kode MKA  |"<< " kelas |"<<" Nilai |"<<endl;
    cout<<"-----------------------------"<<endl;
    for(int j =0;j<jum;j++)
        {
            cout<<"| ";
            cout<<mka[j];
            cout<<"\t\t";
            cout<<kelas[j];
            cout<<"\t";
            cout<<nilai[j];
            cout<<"   |";
            cout<<endl;
        }
    cout<<"-----------------------------"<<endl;
    cout<<"silakan kembali ke menu utama <y/n>";
        cin>>yn;
        if(yn=='y')
            goto ulang;
        else
            return 0;
    case 3:
        return 0;
    }
  }
}