help with recursion

im making a program using recursion to try and make a rectangle.
it .
heres the instructions
1.    Rectangle Printer: Write a recursive function that draws a rectangle to the screen.  Ask the user to enter positive integers for the height and width of the rectangle (error trap for bad input).  Then ask the user for a character to use to print the rectangle (no error trap required).  Then print the rectangle to the screen.  No loops are allowed when printing the rectangle.


so if it said 5 * 5 with the filer a it would look like this
aaaaa
aaaaa
aaaaa
aaaaa
aaaaa

heres my code point me in the right direction



#include <iostream>
using namespace std;




void Rectangle(int height, int width, char filler);


void main()
{
    int width;
    int height;
    char filler;

   

    cout << "Printing a rectangle:\n\n";
    cout << "Enter the height:";
    cin >> height;
    while (height <= 0)
    {
        cout << "The height should be greater than zero\n\n";
        cout << "Enter the height:";
        cin >> height;
    }

    cout << "Enter the width";
    cin >> width;
    while (width <= 0)
    {
        cout << "The width should be greater than zero\n\n";
        cout << "Enter the width:";
        cin >> width;
    }

    cout << "Enter a fill character:";
    cin >> filler;

   
        Rectangle(height, width, filler);
       


}




void Rectangle(int height, int width, char fill)
{
   
   
   
   




    if(width > 0)
    {
        cout<<fill;
        Rectangle(height, width - 1, fill);
    }
    if(height > 0)
    {
        cout << "\n";
        Rectangle(height - 1, width, fill);
    }
       
}

>>12

What is SICP?