Print a box shaped with recursion?

[setpam25]

I want to make a program that print a box shaped like this if i input 4

****
*  *
*  *
****

i know how to do it with for loops but not with recursion

[keskiverto]

How about writitng one line:

void foo( int size, int pos, char fill ) {
  if ( pos < size ) {
    std::cout << fill;
    foo( size, ++pos, fill );
  }
  else {
    std::cout << "*\n";
  }
}

No, it is not perfect. It could do the first and last line (if called correctly), but it does need tinkering for the others.

[28poGNh0]

@keskiverto

I test your code and I think it does not working
also do we really need a recursion here?

[keskiverto]

It is not supposed to "work". Mere food for thought.

There is no "need" in an attempt to explore and learn.