#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
	int nRowsBoxes{0};
	int nColsBoxes{0};
	int nRowsBlanks{0};
	int nColsBlanks{0};

	cout << "How many rows of boxes? ";
	cin >> nRowsBoxes;
	if(!cin)
	{
		cerr << "Could not input the number of rows.\n";
		return EXIT_FAILURE;
	}

	cout << "How many columns of boxes? ";
	cin >> nColsBoxes;
	if(!cin)
	{
		cerr << "Could not input the number of columns.\n";
		return EXIT_FAILURE;
	}

	cout << "How many rows of blanks in each box? ";
	cin >> nRowsBlanks;
	if(!cin)
	{
		cerr << "Could not input the number of blank rows.\n";
		return EXIT_FAILURE;
	}

	cout << "How many columns of blanks in each box? ";
	cin >> nColsBlanks;
	if(!cin)
	{
		cerr << "Could not input the number of blank columns.\n";
		return EXIT_FAILURE;
	}

	// Outer loop for each row of boxes
	for(int row{0}; row < nRowsBoxes; ++row)
	{
		// Top border of the box row
		for(int col{0}; col < nColsBoxes; ++col)
		{
			cout << "+";
			for(int dash{0}; dash < nColsBlanks; ++dash)
			{
				cout << "-";
			}
		}
		cout << "+\n";	// right edge

		// Interior blank rows for each box
		for(int blankRow{0}; blankRow < nRowsBlanks; ++blankRow)
		{
			for(int col{0}; col < nColsBoxes; ++col)
			{
				cout << "|";
				for(int space{0}; space < nColsBlanks; ++space)
				{
					cout << " ";
				}
			}
			cout << "|\n";	// right edge
		}
	}

	// Bottom border (same as the top)
	for(int col{0}; col < nColsBoxes; ++col)
	{
		cout << "+";
		for(int dash{0}; dash < nColsBlanks; ++dash)
		{
			cout << "-";
		}
	}
	cout << "+\n";

	return EXIT_SUCCESS;
}