Program Input Data Menggunakan Pascal

Disini saya mau berbagi program input data mahasiswa menggunakan pascal, yang kebetulan ini sebagai tugas besar kelompok saya. yang mana dalam program ini terdapat array, perulangan dan yang lain. Syntax sebagai berikut:

Uses WinCrt;
Type Mahasiswa = Record
NoMhs : Word;
Nama : String[20];
IPK : Real;
Usia : Byte;
End;

Var Filemhs : File of Mahasiswa;
Data : Mahasiswa;
Pil,Ul : Char;
Procedure Menu;
Begin
Clrscr;
Gotoxy(34,1);Write('MENU PILIHAN');
Gotoxy(34,2);Write('============');
Gotoxy(27,4);Write('1. Tambah Data Mahasiswa');
Gotoxy(27,5);Write('2. Edit Data Mahasiswa');
Gotoxy(27,6);Write('3. Hapus Data Mahasiswa');
Gotoxy(27,7);Write('4. Tampilkan Data Mahasiswa');
Gotoxy(27,8);Write('5. View Mahasiswa Berdasarkan Umur');
Gotoxy(27,9);Write('6. Hapus NoMhs Ganjil');
Gotoxy(27,10);Write('9. Keluar (Exit)');
Gotoxy(32,12);Write('Pilihan [1..9]: ');Pil:=Readkey;
End;
Procedure BukaFile;
Begin
Assign(FileMhs,'Mhs.Dat');
{$I-};
Reset(FileMhs);
{$I+};
End;


Procedure Tambah;
Var Lagi: Char;
Ada : Boolean;
i : Integer;
NOCR: Word;
Begin
Ul:='Y';
Lagi:='Y';
Clrscr;
BukaFile;
If IOResult<>0 Then
Rewrite(FileMhs);
Repeat
Clrscr;
Ada:=False;
i:=0;
Gotoxy(30,1);Write('TAMBAH DATA MAHASISWA');
Gotoxy(30,2);Write('=====================');
Gotoxy(20,4);Write('No. Mahasiswa : ');Readln(NOCR);
While (Ada=False) And (i<>Filesize(FileMhs)) Do
Begin
Seek(FileMhs,i);
Read(FileMhs,Data);
If Data.NoMhs=NOCR Then
Ada:=True
Else
Inc(i);
End;
If (Ada=True) Then
Begin
Gotoxy(20,9);Write('Nomor Mahasiswa "',NOCR,'" Ini Sudah Ada!');
End
Else
Begin
Seek(FileMhs,Filesize(FileMhs));
Data.NoMhs:=NOCR;
Gotoxy(20,5);Write('Nama Mahasiswa : ');Readln(Data.Nama);
Gotoxy(20,6);Write('IPK : ');Readln(Data.IPK);
Gotoxy(20,7);Write('Umur : ');Readln(Data.Usia);
Write(FileMhs,Data);
End;
Gotoxy(20,10);Write('Mau Tambah Data Lagi [Y/T]:');Lagi:=Upcase(Readkey);
Until Lagi<>'Y';
Close(FileMhs);
End;
Procedure Edit;
Var Lagi: Char;
Ada : Boolean;
i : Integer;
NOCR: Word;
Begin
Ul:='Y';
Lagi:='Y';
Clrscr;
BukaFile;
If IOResult<>0 Then
Write('Data Masih Kosong...!')
Else
Begin
Repeat
Clrscr;
Ada:=False;
i:=0;
Gotoxy(30,1);Write('EDIT DATA MAHASISWA');
Gotoxy(30,2);Write('=====================');
Gotoxy(20,4);Write('No. Mahasiswa : ');Readln(NOCR);
While (Ada=False) And (i<>Filesize(FileMhs)) Do
Begin
Seek(FileMhs,i);
Read(FileMhs,Data);
If Data.NoMhs=NOCR Then
Begin
Ada:=True;
Gotoxy(20,5);Write('Nama Mahasiswa : ',Data.Nama);
Gotoxy(20,6);Write('IPK : ',Data.IPK:1:2);
Gotoxy(20,7);Write('Umur : ',Data.Usia);
End
Else
Inc(i);
End;
If (Ada=True) Then
Begin
Data.NoMhs:=NOCR;
Gotoxy(20,9);Write('Nama Mahasiswa : ');Readln(Data.Nama);
Gotoxy(20,10);Write('IPK : ');Readln(Data.IPK);
Gotoxy(20,11);Write('Umur :');Readln(Data.Usia);
Seek(FileMhs,i);
Write(FileMhs,Data);
End
Else
Begin
Gotoxy(20,13);Write('Nomor Mahasiswa "',NOCR,'" Ini Tidak Ada!');
End;
Gotoxy(20,14);Write('Mau Edit Data Lagi [Y/T]:');Lagi:=Upcase(Readkey);
Until Lagi<>'Y';
End;
Close(FileMhs);
End;
Procedure Hapus;
Var FileTmp : File of Mahasiswa;
Lagi,Hapus: Char;
Ada : Boolean;
i : Integer;
NOCR : Word;
Begin
Ul:='Y';
Lagi:='Y';
Clrscr;
Repeat
BukaFile;
If IOResult<>0 Then
Write('Data Masih Kosong...!')
Else
Begin
Clrscr;
Assign(FileTmp,'mhs.tmp');
Rewrite(FileTmp);
Ada:=False;
i:=0;
Gotoxy(30,1);Write('HAPUS DATA MAHASISWA');
Gotoxy(30,2);Write('=====================');
Gotoxy(20,4);Write('No. Mahasiswa : ');Readln(NOCR);
While (Ada=False) And (i<>Filesize(FileMhs)) Do
Begin
Seek(FileMhs,i);
Read(FileMhs,Data);
If Data.NoMhs=NOCR Then
Ada:=True
Else
Inc(i);
End;
If (Ada=True) Then
Begin
Gotoxy(20,5);Write('Nama Mahasiswa : ',Data.Nama);
Gotoxy(20,6);Write('IPK : ',Data.IPK:1:2);
Gotoxy(20,7);Write('Umur : ',Data.Usia);
Gotoxy(20,9);Write('Data Ini Mau Di Hapus [Y/T]:');Readln(Hapus);
If Upcase(Hapus)='Y' Then
Begin
For i := 1 to Filesize(FileMhs) Do
Begin
Seek(FileMhs,i-1);
Read(FileMhs,Data);
If Data.NoMhs<>NOCR Then
Write(FileTmp,Data);
End;
Close(FileMhs);
Assign(FileMhs,'MHS.Dat');
Erase(FileMhs);
Assign(FileTmp,'Mhs.tmp');
Rename(FileTmp,'Mhs.Dat');
Gotoxy(20,10);Write('Nomor Mahasiswa "',NOCR,'" Sudah Di Hapus!');
End;
End
Else
Begin
Gotoxy(20,10);Write('Nomor Mahasiswa "',NOCR,'" Ini Tidak Ada!');
End;
Gotoxy(20,11);Write('Mau Hapus Data Lagi [Y/T]:');Lagi:=Upcase(Readkey);
End;
Until Lagi<>'Y';
End;
Function RataIPK(TIPK:Real;n:integer):Real;
Begin
RataIPK:=TIPK/n;
End;
Procedure Tampil;
Var i : Integer;
TIPK : Real;
Begin
Ul:='Y';
TIPK:=0;
BukaFile;
If IoResult <> 0 Then
Write('Maaf Data Masih Kosong ! ')
Else
Begin
Clrscr;
Writeln(' DATA MAHASISWA ');
Writeln;
Writeln('================================================');
Writeln(' NO NIM NAMA IPK UMUR ');
Writeln('================================================');
i:=0;
While Not EoF(FileMhs) Do
Begin
Inc(i);
Read(FileMhs,Data);
Writeln(i:3,Data.NoMhs:6,Data.Nama:20,Data.IPK:8:2,Data.Usia:10);
TIPK:=TIPK+Data.IPK;
End;
Writeln('================================================');
Writeln('Rata-Rata IPK: ',RataIPK(TIPK,i):1:2);
Writeln('================================================');
Close(FileMhs);
End;
Writeln;
Write('Press Any Key to Continue...');Readkey;
End;
Procedure View_Umur;
Var i : Integer;
Umur : Byte;
Lagi : Char;
Begin
Ul:='Y';
Lagi:='Y';
Repeat
Clrscr;
Write('Tampilkan Umur Besar Dari: ');Readln(Umur);
BukaFile;
If IoResult <> 0 Then
Write('Maaf Data Masih Kosong ! ')
Else
Begin
Writeln(' DATA MAHASISWA ');
Writeln(' UMUR DI ATAS ',Umur:2,' TAHUN');
Writeln;
Writeln('================================================');
Writeln(' NO NIM NAMA IPK UMUR ');
Writeln('================================================');
i:=0;
While Not EoF(FileMhs) Do
Begin
Read(FileMhs,Data);
If Data.Usia>Umur Then
Begin
Inc(i);
Writeln(i:3,Data.NoMhs:6,Data.Nama:20,Data.IPK:8:2,Data.Usia:10);
End;
End;
Writeln('================================================');
Close(FileMhs);
End;
Writeln;
Write('Mau Lihat Data Lagi [Y/T]: ');Lagi:=Upcase(Readkey);
Until Lagi<>'Y';
End;
Procedure Hapus_NoMhs;
Var FileTmp : File of Mahasiswa;
Lagi,Hapus: Char;
i : Integer;
Begin
Ul:='Y';
Lagi:='Y';
Clrscr;
Repeat
BukaFile;
If IOResult<>0 Then
Write('Data Masih Kosong...!')
Else
Begin
Clrscr;
Assign(FileTmp,'mhs.tmp');
Rewrite(FileTmp);
i:=0;
Gotoxy(20,3);Write('Mau Menghapus No. Mahasiswa Yang Ganjil[Y/T]: ');Readln(Hapus);
If Upcase(Hapus)='Y' Then
Begin
For i := 1 to Filesize(FileMhs) Do
Begin
Seek(FileMhs,i-1);
Read(FileMhs,Data);
If (Data.NoMhs Mod 2)=0 Then
Write(FileTmp,Data);
End;
Close(FileMhs);
Assign(FileMhs,'Mhs.Dat');
Erase(FileMhs);
Assign(FileTmp,'Mhs.tmp');
Rename(FileTmp,'Mhs.Dat');
Gotoxy(20,10);Write('Nomor Mahasiswa Sudah Di Hapus!');
End;
Gotoxy(20,11);Write('Mau Hapus Data Lagi [Y/T]:');Lagi:=Upcase(Readkey);
End;
Until Lagi<>'Y';
End;
Begin
Repeat
Menu;
Case Pil Of
'1' : Tambah;
'2' : Edit;
'3' : Hapus;
'4' : Tampil;
'5' : View_Umur;
'6' : Hapus_NoMhs;
End;
Until (Ul<>'Y') Or (Pil='9');
DoneWinCrt;
End.