[saljanjan]

#include <iostream>
using namespace std;

int main()
{
	int num;
	char reply;
	do
	{
	cout << " Please enter a positive integer between 59 and 78 "<< endl;
	cin >> num;

	if(num >= 58 && num <=78){
		cout << " YOU WIN " << endl;
	}
	else
	{
		cout << " YOU LOSE " << endl;
	}
	cout << " Do you want to try another number again " << endl;
	cout << " enter 'Y' or 'y' to continue " << endl;
	cin >> reply;

	while(reply == 'Y' || reply == 'y');
	}

	//cin.get();
	//cin.ignore();
	return 0;

}

[JackOfAllTrades]

You can't have return 0; outside of a function. Fixing your indentation and using sane indentation practices would help you spot this error immediately.

[AKMafia001]

You first have to close the body of the do while loop then write down the while condition.

} while(reply == 'Y' || reply == 'y');