Fixed Number in a Random Position On 2D Array C Programming [on hold]

I'm Required to create a 2 dimensional array, let say its a 12 by 12 2D Array. What i'm requried to do is to place a pair of fix number(1-9) e.g. {1,1},{2,2}{3,3},{4,4},{5,5},{6,6},{7,7},{8,8},{9,9} on a 2D array. These numbers are to have a different position on the 2D array every time the program starts and the remaining array must be blank.

Example: The 2D array will roughly look like this(Let's assume '#' is the frame of the array):

# # # # # # # # # # # #
#  1     9   2        #
#               4     #
#  6     2        8   #
#                     #
#       1   3    5    #
#                     #
#   3          6      #
#         4       5   #
#  9  7               #
#          7     8    #
# # # # # # # # # # # #

The one i've done so far is generating random number from 1-9(not pair) to all of the array.

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
int array[12][12];
int i,j;


  srand((unsigned)time(NULL));


   for(i=0;i<10;i++)
   {
    for(j=0;j<10;j++)
    {
      array[i][j]=rand()%9+1;
      printf("%3d",array[i][j]);
   }
      printf("\n");
 }
     return(0);
 }

How should i do it anyway?