[C++] Program Mencari Invers Matriks Ordo 2x2 dengan C++

Seperti yang bisa sobat lihat di samping, itu adalah rumus umum invers matriks A yang berordo 2x2. Mari kita implementasikan pada bahasa C++.

//Determinan Matriks 2x2
#include <iostream.h>
#include <conio.h>

#define Nmaks 3

void main()
{
 typedef float matriks[Nmaks][Nmaks];
 int i,j;
 float determinan, hasilbagidet;
 matriks A,a;
 char answer;



 do
 {
 do
 {
  clrscr();
  cout<<"DETERMINAN MATRIKS A : "<<endl<<endl;
 cout<<"Masukkan Nilai Matriks A : "<<endl;
 for(i=1;i<=2;i++)
 {
  for(j=1;j<=2;j++)
  {
   cout<<"A["<<i<<","<<j<<"] = ";
   cin>>A[i][j];
  }
 }

 clrscr();
 cout<<endl;
 //Proses Mencari Determinan Matriks A

 determinan = (A[1][1] * A[2][2]) - (A[2][1] * A[1][2]);
 }while (determinan == 0);
 hasilbagidet = 1/determinan;

 //mencari invers
 a[1][1] = hasilbagidet * A[2][2];
 a[1][2] = hasilbagidet * -A[1][2];
 a[2][1] = hasilbagidet * -A[2][1];
 a[2][2] = hasilbagidet * A[1][1];

 clrscr();
 //Output Matriks A
 gotoxy(1,5);
 cout<<"A = ";
 for(i=1;i<=2;i++)
 {
  for(j=1;j<=2;j++)
  {
   gotoxy(2+4*j,2+2*i);
   cout<<A[i][j];
  }
 }

 gotoxy(1,8);
 cout<<"Determinan Matriks A = "<<determinan;
 cout<<endl;

 //Output Invers Matriks A
 gotoxy(1,10);
 cout<<"Invers Matriks A : "<<endl;
 gotoxy(2,15);
 cout<<"A^-1 = ";
 for(i=1;i<=2;i++)
 {
  for(j=1;j<=2;j++)
  {
   gotoxy(1+9*j,12+2*i);
   cout<<a[i][j];
  }
 }


 getch();
 clrscr();
 cout<<"== PROGRAM SELESAI =="<<endl<<endl;
 cout<<"Mau Melakukan Perhitungan Lagi?? [Y/T] "; cin>>answer;
 }
 while ((answer == 'y') || (answer == 'Y'));
}

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