#include <iostream>
#include <cstdlib>
#include <time.h>
#include <cmath>

using namespace std;
class myArray{
public:
	myArray();
    void setRandomNum();
	void getPrint();
//	void maxElements();
	void commonElement();

private:
	int n;
	int A[20];
};
	myArray::myArray(){//constructor
		n=0;
	}
	void myArray::setRandomNum(){
		for (int i=0;i<=20;i++){
			n=rand()%20+1;
			A[i]=n;
		}
	}
	void myArray::getPrint(){
	for (int i=0;i<=20;i++)
		cout<<A[i]<<endl;
	}

//	void myArray::maxElements(){
//	}
	void myArray::commonElement(){
		int c=0;
		int newArray[20];
		for (int a=0;a<20;a++)//set all values to zero
			newArray[a]=0;
		for (int i=0;i<20;i++){
			for (int j=i+1;j<20;j++){//nested for loop to sort equal numbers
				if (A[i]==A[j]){//compare numbers
					newArray[c]=A[i];//assign equal numbers to new array
					c++;
			}
		}
		}
		for (int i=0;i<20;i++){
			for (int j=i+1;j<20;j++){
				if (newArray[i]==newArray[j]&&newArray[j]!=0)
					cout<<newArray[i]<<endl;}
		}
	}
int main(){
 myArray one;



	char option;//set menu
do 	{
		cout << endl << endl << "Choose from:" << endl << endl;
		cout << "1. Set Array" << endl;
		cout << "2. Output Array" << endl;
		cout << "3. Output Common number." << endl;
		//cout << "4. Compare Second to First Word" << endl;
		//cout << "5. Stop Program" << endl;
		//cout << "6. " << endl;
		//cout << "7. " << endl;
		//cout << "8. " << endl;

		cin >> option;

		switch (option)
		{
		case '1':
			cout<<"The Array is initialized";
			one.setRandomNum();
			break;
		case '2':
			cout<<"The Array Elements";
			one.getPrint();
			break;
		case '3':
			cout<<"The largest common elements are:"<<endl;
			one.commonElement();		
		//	break;
		//case '4':
		//	cout<<newString.compareOddStrings(first, second);
		//	break;
		//case '5':
		//	
		//	break;
		//case '6':
		//	
		//	break;
		//case '7':
		//	
		//	break;
		//case '8':
		//	
		//	break;
		default:
			cout << "invalid input!!! Try it again." << endl;
		}
	} while (option != 5);
	
system ("pause");
return 0;
}