Script C++ Percabangan

dibawah ini adalah scrip program C++, tugas kuliah yang saya buat untuk memenuhi nilai akhir semester.
kalian bisa copy script dibawah ini.
semoga berhasil dan membantu tugas kalian,,
Software dapat di Download disini

#include "iostream.h"

#include "conio.h"

#include "windows.h"

main(){

int pilih;

char nama [30];

float Li,r,Lp,p,l,Ls,a,t;

const float phi=3.14;

cout<<"=========================\n";

cout<<" PROGRAM MENU HITUNG\n";

cout<<"=========================\n";

cout<<"1.Hitung Luas Lingkaran\n";

cout<<"2.Hitung Luas Persegi\n";

cout<<"3.Hitung Luas Segitiga\n";

cout<<"4.Keluar\n";

cout<<"=========================\n\n";

cout<<"Nama Anda :";

cin>>nama;

cout<<"\nSelamat Datang ["<

cout<<"] di Aplikasi Menghitung\n\n\n";

while(pilih>=0){

cout<<"Pilihan Anda (1/2/3/4) :";

cin>>pilih;

switch(pilih){

                        case 1:

                        cout<<"=================================\n";

                        cout<<" Menghitung Luas Lingkaran\n";

                       cout<<"=================================\n";

                        cout<<"Masukan jari - jari :";

                       cin>>r;

                        Li=phi*r*r;

                        cout<<"Luas Lingkaran adalah :"<

                       cout<<"---------------------------------\n\n\n";

                        break;

                                                case 2:

                                                cout<<"================================\n";

                                                cout<<" Menghitung Luas Persegi\n";

                                             cout<<"================================\n";

                                              cout<<"Masukan Panjang Persegi :";

                                             cin>>p;

                                              cout<<"Masukan Lebar Persegi :";

                                              cin>>l;

                                             Lp=p*l;

                                             cout<<"Hasil Luas Persegi Adalah :"<

                                               cout<<"--------------------------------\n\n\n";

                                             break;

                     case 3:

                    cout<<"==================================\n";

                    cout<<" Menghitung Luas Segitiga\n";

                    cout<<"==================================\n";

                    cout<<"Masukan Alas Segitiga :";

                    cin>>a;

                    cout<<"masukan Tinggi Segitiga :";

                    cin>>t;

                    Ls=0.5*a*t;

                    cout<<"Hasil Luas Segitiga Adalah :"<

                    cout<<"----------------------------------\n\n\n";

                    break;

                                            case 4:

                                          cout<<"================================\n";

                                          cout<<">>  TRIMAKASIH                <<                                                                  \n";

                                          cout<<"================================\n";

                                          break;

                    default:

            cout<<"KODE YANG ANDA MASUKAN SALAH !!!!!!\n";

            }

            }

getch();

}