#include #include using namespace std; int main() { //Output graph paper. cout << "How many rows (e.g., 10)? "; int nrows {0}; cin >> nrows; if (!cin) { cerr << "Sorry, that wasn't a number.\n"; return EXIT_FAILURE; } cout << "How many columns (e.g., 10)? "; int ncols {0}; cin >> ncols; if (!cin) { cerr << "Sorry, that wasn't a number.\n"; return EXIT_FAILURE; } for (int r {0}; r < nrows; ++r) { for (int c {0}; c < ncols; ++c) { cout << "+----"; } cout << "\n"; for (int c {0}; c < ncols; ++c) { cout << "| "; } cout << "\n"; } return EXIT_SUCCESS; }