I had a membership to this site(stpdougie) but i could not login even when changing my password so created another account here goes.

i have made a program using a switch statement (case) it works fine,it basically does calculations and displays other info.The only problem is i want to outline the output in a frame of asterisks i have already made the frame using for loops but i have no idea how to implement it with my code here is the frame :

 for(int down = 0; down < 20; down++)
{
for(int across = 0; across < 40; across++)
  {
if ( down == 0 || down == 19)
  printf("*");
 else if (across == 0 || across ==39 )
 printf ( "*");
 else printf(" ");