lab10_2.cpp

#include<iostream>
using namespace std;

void  printO(int m, int n){
	if ((m <= 0) || (n <= 0)){
		cout << "Invalid input";
	}
	else{
		for (int i = 0; i < m ; i++){
			for (int j = 0; j < n; j++){
				cout << 'O';
			}
			cout << "\n";
		}
	}
}

int main(){
	
	printO(2,2);
	cout << "\n";
	
	printO(3,5);
	cout << "\n";	
	
	printO(5,3);
	cout << "\n";	
	
	printO(0,3);
	cout << "\n";	
	
	printO(7,-1);
	cout << "\n";	
	
	return 0;
}