Program Matriks Gauss Jordan 2x2 (Borland C++)

Pada kesempatan kali ini, saya akan memposting sebuah program matriks gauss jordan 2x2, sebenarnya program ini sudah di posting di blog mat kelompok saya (http://ayuk-belajarmatematika.blogspot.com).
Program ini merupakan tugas yang diberikan oleh dosen matematika saya di kampus.

Berikut SOURCE CODE untuk matrik Gauss Jordan 2x2

#include<iostream.h>
#include<conio.h>

void main()
{
char pil_pro;
float a11, a21, a12, a22, A11=1, A21=0, A12=0, A22=1;
float b11, b21, b12, b22, B11, B21, B12, B22;
float c11, c21, c12, c22, C11, C21, C12, C22;
float d11, d21, d12, d22, D11, D21, D12, D22;
float e11, e21, e12, e22, E11, E21, E12, E22;

cout<<"\n\t\t\tPROGRAM MATRIKS GAUSS JORDAN "<<endl;
cout<<"\t\t==========================================="<<endl<<endl;
ulang_masuk:
cout<<"\t(1,1) : ";
cin>>a11;
cout<<"\t(1,2) : ";
cin>>a21;
cout<<"\t(2,1) : ";
cin>>a12;
cout<<"\t(2,2) : ";
cin>>a22;

cout<<""<<endl;
cout<<"    ------------------"<<endl<<endl;
cout<<"\t["<<a11<<"\t"<<a21<<"]"<<endl;
cout<<"\t["<<a12<<"\t"<<a22<<"]"<<endl<<endl;
cout<<"    ------------------"<<endl;
cout<<"\n[U] Ulang masukkan angka  [L] Lanjutkan Penghitungan   |   Pilih  :  ";
cin>>pil_pro;
if (pil_pro=='U' || pil_pro=='u')
    {goto ulang_masuk;}
else if (pil_pro=='L' || pil_pro=='l')
    {goto next_satu;}
else
    {goto end;}

//langkah pertama
next_satu:
ulang_satu:
cout<<""<<endl<<endl<<endl<<endl;
cout<<"\t|---------------|"<<endl;
cout<<"\t|Langkah pertama|"<<endl;
cout<<"\t|---------------|"<<endl<<endl;
cout<<"\t["<<a11<<"\t"<<a21<<" | "<<A11<<"\t"<<A21<<"]"<<endl;
cout<<"\t["<<a12<<"\t"<<a22<<" | "<<A12<<"\t"<<A22<<"]"<<endl<<endl;
cout<<"\tMengubah Kolum 1 dan baris 1 menjadi = 1"<<endl<<endl;
//hasil pertama
b11=a11/a11;b21=a21/a11;B11=A11/a11;B21=A21/a11;
b12=a12;b22=a22;B12=A12;B22=A22;
cout<<"\tHasilnya : "<<endl;
cout<<"\t--------"<<endl;
cout<<"\t["<<b11<<"\t"<<b21<<"|\t"<<B11<<"\t"<<B21<<"]"<<endl;
cout<<"\t["<<b12<<"\t"<<b22<<"|\t"<<B12<<"\t"<<B22<<"]"<<endl;
cout<<"\n\n\t[ U ] Ulang     [ L ] Lanjut   |   Pilih proses :  ";
cin>>pil_pro;
if (pil_pro=='U' || pil_pro=='u')
    {goto ulang_satu;}
else if (pil_pro=='L' || pil_pro=='l')
    {goto next_dua;}
else
    {goto end;}


//langkah kedua
ulang_dua:
next_dua:
cout<<""<<endl<<endl<<endl<<endl;
cout<<"\t|-------------|"<<endl;
cout<<"\t|Langkah kedua|"<<endl;
cout<<"\t|-------------|"<<endl<<endl;
cout<<"\tMengubah Kolum 2 dan Baris 2 menjadi = 1"<<endl<<endl;
c11=b11;c21=b21;C11=B11;C21=B21;
c12=(b11*(-b12))+b12;c22=(b21*(-b12))+b22;
C12=(B11*(-B12))+B12;C22=(B21*(-B12))+B22;
cout<<"\tHasilnya : "<<endl;
cout<<"\t--------"<<endl;
cout<<"\t["<<c11<<"\t"<<c21<<" | "<<C11<<"\t"<<C21<<"]"<<endl;
cout<<"\t["<<c12<<"\t"<<c22<<" | "<<C12<<"\t"<<C22<<"]"<<endl;
cout<<"\n\n\t[ U ] Ulang     [ L ] Lanjut   |   Pilih proses :  ";
cin>>pil_pro;
if (pil_pro=='U' || pil_pro=='u')
    {goto ulang_dua;}
else if (pil_pro=='L' || pil_pro=='l')
    {goto next_tiga;}
else
    {goto end;}

ulang_tiga:
next_tiga:
cout<<""<<endl<<endl<<endl<<endl;
cout<<"\t|--------------|"<<endl;
cout<<"\t|Langkah ketiga|"<<endl;
cout<<"\t|--------------|"<<endl<<endl;
cout<<"\tMengubah Kolom 3 dan Baris 3 menjadi = 1"<<endl<<endl;
d11=c11;d21=c21;D11=d11;D21=C21;
d12=c12/c22;d22=c22/c22;D12=C12/c22;D22=C22/c22;
cout<<"\tHasilnya : "<<endl;
cout<<"\t--------"<<endl;
cout<<"\t["<<d11<<"\t"<<d21<<" | "<<D11<<"\t"<<D21<<"]"<<endl;
cout<<"\t["<<d12<<"\t"<<d22<<" | "<<D12<<"\t"<<D22<<"]"<<endl;
cout<<"\n\n\t[ U ] Ulang     [ L ] Lanjut   |   Pilih proses :  ";
cin>>pil_pro;
if (pil_pro=='U' || pil_pro=='u')
    {goto ulang_tiga;}
else if (pil_pro=='L' || pil_pro=='l')
    {goto next_empat;}
else
    {goto end;}


ulang_empat:
next_empat:
cout<<""<<endl<<endl<<endl<<endl;
cout<<"\t|-------------|"<<endl;
cout<<"\t|Langkah empat|"<<endl;
cout<<"\t|-------------|"<<endl<<endl;
cout<<"\tMengubah Kolom 4 dan Baris 4 menjadi = 1"<<endl<<endl;
e11=(d12*(-d11))+d11;e21=(d22*(-d12))+d21;
E11=(D12*(-d11))+d11;E21=(d22*(-d21))+D11;
e12=d12;e22=d22;E12=D12;E22=D22;
cout<<"\tJadi Hasil Inversrnya adalah : "<<endl;
cout<<"\t-----------------------------"<<endl;
cout<<"\t["<<e11<<"\t"<<e21<<" | "<<E11<<"\t"<<E21<<"]"<<endl;
cout<<"\t["<<e12<<"\t"<<e22<<" | "<<E12<<"\t"<<E22<<"]"<<endl;

end:
cout<<""<<endl<<endl<<endl;
cout<<"\t\t\tTerima Kasih telah menggunakan program ini :D"<<endl;
getche ();
}

Berikut Print Screen dari program diatas :

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Program Kalkulator 4 operand, 4 operator (Borland C++)

#include <iostream.h>
#include <conio.h>


void main()
{
  awal:
  float a, b;
  char c;

  cout << "\n\t--------------Kalkulator--------------\n";
  cout << "\n";
  cout << "\n";

  cout << "\n\tPilihan operator:\n";
  cout << "\t[+] Penjumlahan\n";
  cout << "\t[-] Pengurangan\n";
  cout << "\t[*] Perkalian\n";
  cout << "\t[/] Pembagian\n";
  cout << "\t[=] Hasilnya\n";
  cout << "\n\tMasukkan Perhitungan\t:  ";
  cin  >> a;
  cout << " ";
  cin  >> c;

  do
  {
    cout << " ";
    cin  >> b;
    switch (c)
    {

        case '*':
      a=a*b;
      break;

      case '/':
      a=a/b;
      break;

      case '+':
      a=a+b;
      break;

      case '-':
      a=a-b;
      break;

      case '=':
      break;

      default:
      goto awal;
    }

    cout << " ";
    cin  >> c;
  }
  while (c!='=');
  cout << "\n\tHasilnya adalah\t\t:  " << a;

  getche ();
}

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Program Konversi Hari (Borland C++)

#include <stdio.h>
#include <conio.h>

int y, z, tahun, bulan, minggu, hari;
void main()
{
    printf("               ******  Mengkonversi Hari  ******\n\n");

    printf("\tMasukkan Hari = ");
    scanf ("%d", &y);

    tahun=y/365;
    z=y%365;

    bulan=z/30;
    y=z%30;

    minggu=y/7;
    z=y%7;

    hari=z%30;

    printf(" \n");
    printf("\t %d tahun \n", tahun);
    printf("\t %d bulan \n", bulan);
    printf("\t %d minggu \n", minggu);
    printf("\t %d hari\n", hari);

    getch();

}

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Program Luas Permukaan Balok (Borland C++)

#include<iostream.h>
#include<string.h>
#include<math.h>
#include<conio.h>
float a,b,c,d;
void main()
{
cout<<"\t\t================================="<<endl;
cout<<"\t\t=Menghitung Luas Permukaan Balok="<<endl;
cout<<"\t\t================================="<<endl<<endl;
cout<<"\tMasukkan Nilai panjang           : ";cin>>a;
cout<<"\tMasukkan Nilai lebar             : ";cin>>b;
cout<<"\tMasukkan Nilai tinggi            : ";cin>>c;
d=2*(a*b)+2*(a*c)+2*(b*c);
cout<<" "<<endl;
cout<<"\tLuas Permukaan Balok adalah      : "<<d<<endl;
getch();
}

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Program Luas Segitiga (Borland C++)

#include <iostream.h>
#include <conio.h>

void main()

{
float Alas, Tinggi,Luas_Segitiga;
cout<<"\t\t======================="<<endl;
cout<<"\t\t=Program Luas Segitiga="<<endl;
cout<<"\t\t======================="<<endl<<endl;

cout<<"\tMasukan Nilai Alas Segitiga\t: ";
cin>>Alas;
cout<<"\tMasukan Nilai Tinggi Segitiga\t: ";
cin>>Tinggi;
Luas_Segitiga=0.5*Alas*Tinggi;
cout<<" "<<endl;
cout<<"\tNilai Luas Segitiga adalah\t: " <<Luas_Segitiga<<endl;

getche();
}

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Program Luas Lingkaran (Borland C++)

#include <iostream.h>
#include <conio.h>

void main ()
{
    float luas, jari_jari;
    cout << "\t\t==========Mencari Luas Lingkaran==========" <<endl<<endl;

    cout << "\tMasukkan Jari-jari Lingkaran\t\t: ";
   cin >> jari_jari;

    luas=3.14*jari_jari*jari_jari;

   cout<<" "<<endl;
   cout <<"\tLuas Lingkaran\t\t\t\t: ";
   cout << luas;

    getche();
}

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