Printing numbers

I am writing a program to display as below

when n=3
1 2 3
7 8 9
4 5 6

when n=5
1 2 3 4 5
11 12 13 14 15
21 22 23 24 25
16 17 18 19 20
6 7 8 9 10

my program is

#include<stdio.h>
#include<conio.h>
int main()
{
    int n=5,r=1,c=1,i=1,mid=0;
    if(n%2==0)
      mid=(n/2);
    else 
      mid=(n/2)+1;
      printf("mid = %d\n",mid);
    while(r<=n)
    {
      while(c<=n)
      {
        printf("%d ",i);
        c++;
        i++;
      }
      r++;
      if(r<=mid)
       i=i+n;
      else
       i=i-(2*n);
      printf("\n");
      c=1;
    }
    getch();
    return 0;
}

when I give n=3, I am getting my expected output. but when I give n=5 I am getting as below

1 2 3 4 5
11 12 13 14 15
21 22 23 24 25
16 17 18 19 20
11 12 13 14 15

Could someone please help how to achieve expected output.

via Chebli Mohamed