//upper left matrix
// code
#include<stdio.h>
#include<conio.h>
main()
{
     int i, j, a[20][20], n;
     printf("Enter size of matrix: ");
     scanf("%d", &n);
     printf("Enter the elements\n");
     for(i=0;i<n;i++)
     {
         for(j=0;j<n;j++)
         {
             scanf("%d", &a[i][j]);
         }
     }
     printf("\n\n The Matrix is\n");
     for(i=0;i<n;i++)
     {
         for(j=0;j<n;j++)
         {
             printf("\t%d", a[i][j]);
         }
         printf("\n");
     }
     printf("\n The upper right matrix is:\n");
     for(i=0;i<n;i++)
     {
         for(j=0;j<n;j++)
         {
             if(i==j||j>i)
             {
                 printf("%d", a[i][j]);
             }
             else
                 printf(" ");
         }
         printf("\n");
     }
     getch();
     return 0;
 }
// output
Enter the size of matrix:3
Enter the elements:1
2
3
4
5
6
7
8
9
The matrix is:
1 2 3
4 5 6
7 8 9

The upper right matrix is:
1 2 3
   5 6
      9