#include <iostream> 
#include <iomanip>
#include <cstdlib> // for rand() 
#include <ctime> 
using namespace std; 

const int LOW =-5; //global const for the lower limit 
const int UP = 15; //global const for the upper limit

const int ROW = 5; 
const int COL = 4; 

//int rows;
//int cols;

void GenerateArray(int[][COL], int, int, int, int); //function prototype 
void Print(int[][COL], int, int); 
bool AllPositive(int[][COL], int&, int&);
void SubArray(int[][COL], int&, int&);

void main(){ 
	
   //declare and initialize array
	int rows;
	int cols;
	int table[ROW][COL];
	char yorn;

	srand(time(NULL)); 

	GenerateArray(table, ROW, COL, UP, LOW); //function call 

	cout << "The original table is: "; 
	Print(table, ROW, COL); 

	rows=ROW; // set constant to variable
	cols=COL; // set constant to variable

	if(AllPositive(table, rows, cols)==false){
		cout << "\n\nStart subarray processing? (Y/N): ";
		cin >> yorn;
		if((yorn == 'Y') || (yorn == 'y')){ // If they answer yes, it starts
			while(AllPositive(table, rows, cols)==false){
				cout << "\n\nSome Elements in the orginal table are negative";
				SubArray(table, rows, cols);
			}
		}
	}
		if(AllPositive(table, rows, cols)==true)
		cout << "\n\n All elements in this subarray are positive.";

	cout << endl;
} // end program 

void GenerateArray (int a[][COL], int row, int col, int upper_limit, int lower_limit){ 
	for (int r = 0; r < row; r++) 
		for (int c = 0; c < col; c++) 
			a[r][c] = rand()%(upper_limit - lower_limit + 1) + lower_limit;
}

void Print(int a[][COL], int row, int col){ 
   for ( int r = 0; r < row; r++ ) { 
	  cout << endl; 
      for ( int c = 0; c < col; c++ ) 
         cout << setw(5) << a[r][c]; 
   } 
} 

bool AllPositive(int a[][COL], int & row, int & col){ 
   for ( int r = 0; r < row; r++ ) 
      for ( int c = 0; c < col; c++ ) 
         if(a[r][c] < 0)
			return false;
   return true;
}

void SubArray(int a[][COL], int & ROW, int & COL){
		int rows;
		int cols;
		cout << "\nEnter # of rows: ";
		cin >> rows;
		while(rows > ROW){
			cout << "ERROR! Should be at most 5. Reenter: ";
			cin >> rows;
		}
		cout << "Enter # of columns: ";
		cin >> cols;
		while(cols > COL){
			cout << "ERROR! Should be at most 4. Reenter: ";
			cin >> cols;
		}
		Print(a, rows, cols); 
}