#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{

	cout << "How many rows of boxes (e.g., 10)? ";
	int nrows_boxes {0};
	cin >> nrows_boxes;

	if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		return EXIT_FAILURE;
	}

	cout << "How many columns of boxes (e.g., 10)? ";
	int ncols_boxes {0};
	cin >> ncols_boxes;

	if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		return EXIT_FAILURE;
	}

	cout << "How many rows of blanks in each box (e.g., 1)? ";
	int nrows_blanks {0};
	cin >> nrows_blanks;

	if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		return EXIT_FAILURE;
	}

	cout << "How many columns of blanks in each box (e.g., 3)? ";
	int ncols_blanks {0};
	cin >> ncols_blanks;

	if (!cin) {
		cerr << "Sorry, that wasn't a number.\n";
		return EXIT_FAILURE;
	}

	for (int r {0}; r < nrows_boxes; ++r) {

		for (int c {0}; c < ncols_boxes; ++c) {
			cout << "+";
			for (int k {0}; k < ncols_blanks; ++k) {
				cout << "-";
			}
		}
		cout << "+\n";

		for (int i {0}; i < nrows_blanks; ++i) {
			for (int c {0}; c < ncols_boxes; ++c) {
				cout << "|";
				for (int k {0}; k < ncols_blanks; ++k) {
					cout << " ";
				}
			}
			cout << "|\n";
		}
	}

	for (int c {0}; c < ncols_boxes; ++c) {
		cout << "+";
		for (int k {0}; k < ncols_blanks; ++k) {
			cout << "-";
		}
	}
	cout << "+\n";

	return EXIT_SUCCESS;
}