How to ask the user if wants to play again?

[TananTanTananTanToink]

How to apply 'play again y/n' in simple hello world code.

// Repeat Hello world, by

// include the iostream library
#include iostream

//using the standard namespace
using namespace std;

void main()
{
cout << " Hello world " << endl;
cout << " Whatsup " << endl;
system ("pause");
cout << " I heard your dying " << endl;
cout << " world! " << endl;
system ("pause");

}

[whitenite1]

@TananTanTananTanToink

Here's one way.

// Repeat Hello world, by

// include the iostream library
#include <iostream>
#include <windows.h> // For Sleep command, instead od System("pause");

//using the standard namespace
using namespace std;

int main()
{
	char yn='y';
	do
	{
cout << " Hello world " << endl;
cout << " Whatsup " << endl;
Sleep(1500);

cout << " I heard your dying " << endl;
cout << " world! " << endl;

do
{
	cout << "Show this text again?? : Enter a 'y' or 'n' " << endl;
	cin >> yn;

if(yn!='y'&& yn!='Y'&&yn!='n'&&yn!='N')
	cout << endl << "I only respond to the letters 'y' or 'n'" << endl << "Try again!!" << endl << endl;
}while(yn!='y' && yn!='Y' && yn!='n' && yn!='N');
}while (yn=='y' || yn=='Y');


	cout << "Okay, I'm outta here...." << endl << endl;
}

[TheIdeasMan]

A rather different way - not the full code - just to give you an idea:

#include <locale> //for the toupper function

bool Quit = false;
char Answer;

while(!Quit) {

    //your code here

    std::cout << "Would you like to quit Y / N" << std::endl;
    std::cin >> Answer;

    Answer = std::toupper(Answer);
    if (Answer == 'Y') {
         Quit = true;
    }
} 

I personally really dislike things like this:

if(yn!='y'&& yn!='Y'&&yn!='n'&&yn!='N')

And nested do loops with repeated tests. This results in 12 LOC just to decide whether to repeat or not.

HTH

[buffbill]

iostream should be in angle brackets like <iostream>
void main() should be int main()
system("pause") is not recommended to keep the screen open. cin.get() is an improvement for a variety of reasons that you will become familiar with in time, but its not the only alternative.

[Imadatobanisa]

Another choice :

while(bQuit == false)
{
     //code....
     cout << "Would you like to quit (Press Y)";
     cin >> choice;
     if(choice == 'y' || choice == 'Y')
          bQuit = true;
}

[TheIdeasMan]

@JM

Not another choice, just a poorer version of what I had.

[Suggs]

Or

#include <iostream>
#include <string>

using namespace std;

void main()
{
rerun:
  cout << " Hello world " << endl;
  cout << " Whatsup " << endl;
  system ("pause");
  cout << " I heard you're dying " << endl;
  cout << " world! " << endl;
  cout << "Would you like to play again? (Y/N)";

string yorn;
cin >> yorn;

if (yorn == "Y" || yorn == "y")
    goto rerun;

else
    return;


}

[TheIdeasMan]

@Suggs

Couple of problems with your code:

line 4: using namespace std should be avoided
line 6: should be int main()
line 8: see below about goto
line 23: return 0; //return an int
line 19: use toupper function to avoid testing the variable twice
line 20: goto is really really bad, always use loops or functions