Q. Adjoint of a 3X3 and 2X2 matrix ?

THE OUTPUT WOULD BE

 
#include<stdio.h>
#include<conio.h>
  void main( )
  {    clrscr( );
        int a[5][5],j,i,r1,c1,A1,A2,A3,A4,A5,A6,A7,A8,A9,d,A[5][5],B1,B2,B3,B4;
        printf("Enter row of matrix A=");
        scanf("%d",&r1);
        printf("Enter column of matrix A=");
        scanf("%d",&c1);
        for(i=1;i<=r1;i++)
        { for(j=1;j<=c1;j++)
          { printf("Enter an element:");
             scanf("%d",&a[i][j]);
          }
        }
        printf("\nMatrix element of A are given below\n");
        for(i=1;i<=r1;i++)
       { for(j=1;j<=c1;j++)
         { printf("\t%d",a[i][j]);
         }
         printf("\n");
       }
       if(r1==3)
      { A1=(a[2][2]*a[3][3]-a[3][2]*a[2][3]);
         A2=(a[2][3]*a[3][1]-a[2][1]*a[3][3]);
         A3=(a[2][1]*a[3][2]-a[3][1]*a[2][2]);
         A4=(a[1][3]*a[3][2]-a[1][2]*a[3][3]);
         A5=(a[1][1]*a[3][3]-a[1][3]*a[3][1]);
         A6=(a[1][2]*a[3][1]-a[1][1]*a[3][2]);
         A7=(a[1][2]*a[2][3]-a[1][3]*a[2][2]);
         A8=(a[1][3]*a[2][1]-a[1][1]*a[2][3]);
         A9=(a[1][1]*a[2][2]-a[1][2]*a[2][1]);
        printf("\nAdjoint of matrix A =\n\t%d\t%d\t%d\n\t%\t%d\t%d\n\t%d\t%d\t%d",A1,A4,A7,A2,A5,A8,A3,A6,A9);
       d=a[1][1]*(a[2][2]*a[3][3]-a[2][3]*a[3][2])-a[1][2]*(a[2][1]*a[3][3]-a[3][1]*a[2][3])                 +a[1][3]*(a[2][1]*a[3][2]-a[2][2]*a[3][1]);
        printf("\nDetertiment of matrix A=%d",d);
      }
      if(r1==2)
     { B1=a[1][1];
        B2=a[1][2];
        B3=a[2][1];
        B4=a[2][2];
        printf("\nAdjoint of matrix A =\n\t%d\t%d\n\t%d\t%d",B4,-B2,-B3,B1);
        d=a[1][1]*a[2][2]-a[1][2]*a[2][1];
        printf("\nDetertiment of matrix A=%d",d);
     }
     getch( );
}