Untitled

#include <iostream>
using namespace std;

int main()
{
	int number = 0;
	switch (number)
	{
	case 1:

	int num1,num2,num3,num4, num5;
	cout << "Enter 5 numbers:\n";
	cin >> num1>>num2>>num3>>num4>>num5;

	    if (num5 - num4 == num3 - num2 && num2 - num1)
	    {
		cout << "This is arithmetic series\n";
	    }

	else
		if (num5 - num4 != num3 - num2 && num2 - num1)
		{
		cout << "Error, This is not arithmetic series\n";
		}

		break;

	case 2:


	default:
		cout << "An illegal option\n";


	return 0;
}