I'm New at this and can't figure this out

[Tompoly]

HI I have pasted my code below for a program we are suppose to hand in. I'm new at this and can't figure out whats wrong with my code. Can someone please help me out? We are to write a program for a guessing game and include a start menu, here is what I got:

#include <cstdlib>
#include <iostream>
#include <process.h>
#include <time.h>
#include <windows.h>

void showMenu();
void gameInstructions();
void playGame ();
bool QuitGame();

int main()
{
	system ("cls");
	
	int choice;

	cout <<"Welcome to my guessing game";
    cout <<"1. Explain Game";
	cout <<"2. Play Game";
	cout <<"3. Exit";
	
	switch (choice)

	{
		case 1: explainGame();
			break;
			
        
		case 2:
			playGame();
			break;

		case 3:
			quitGame();
		    break;

		default:
			cout << "Choose another number";
			
	}
	system ("cls");
	return 0;
}
void explainGame()
{
	system ("cls");
	cout <<"Explain Game";
	cout<<"Guess a number between  1 and 20, you have three guesses";
	system ("pause");
	main();
}

void playGame()
{
	int guess;
	srand(time(NULL));
	int randomNumber = rand()%20 +1;
	system ("cls");

	for (int i=1; i<=3; i++)
	{
		cout <<"Guess The Number";
		cin >> guess;
		cin.ignore();

		if (guess == randomNumber)
		{
			cout << "Congratulations, you got it!";
			cout << "You guessed the number in" <<i<<"tries";
			system("pause");
			return;

		}
		else if (guess > randomNumber)
		{
			cout <<"Your guess is too high  Try again!";
		}
		else if (guess < randomNumber)
		{
			cout<<" Your guess is too low  Try again!";
		}
		else if (i=3)
			cout<<" Sorry, you have no more guesses.";
		system("pause");
		main();
	}
}

bool quitGame()
{
	bool quit;
	char y='y';

	cout<<" Are you sure you want to quit? (y/n)";
	cin >> quit;
	if  (quit==y)
	{
		quit = false;
		return quit;
	}
	else
	{
		quit = true;
		return main();
	}
}

These are the error codes I'm Getting:
Error 12 error C2065: 'cin' : undeclared identifier
Error 1 error C2065: 'cout' : undeclared identifier
Error 5 error C3861: 'explainGame': identifier not found

[aas09f]

Why don't you start by putting your code into code format (the "code" button) and then telling us what kind of errors you're getting.

[LB]

@aas09f: He tried to do that but accidentally put his code after the code tags instead of inside of them.

@Tompoly: Where do you ask the user to input choice? Did you forget 'using namespace std;'? Did you mean 'gameInstructions' instead of 'explainGame'?

[Tompoly]

Ok I fixed a few errors but I still am getting one error message & 2 warrings:
Error 1 error C3861: 'quitGame': identifier not found
Warning 3 warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)
Warning 2 warning C4805: '==' : unsafe mix of type 'bool' and type 'char' in operation

#include <cstdlib>
#include <iostream>
#include <process.h>
#include <time.h>
#include <windows.h>

void showMenu();
void explainGame();
void playGame ();
bool QuitGame();

using namespace std;

int main()
{
	system ("cls");
	
	int choice;

	cout <<"Welcome to my guessing game";
	cout <<"Please enter  choice";
    cout <<"1. Explain Game";
	cout <<"2. Play Game";
	cout <<"3. Exit";
	
	switch (choice)

	{
		case 1: explainGame();
			break;
			
        
		case 2:
			playGame();
			break;

		case 3:
			quitGame();
		    break;

		default:
			cout << "Choose another number";
			
	}
	system ("cls");
	return 0;
}
void explainGame()
{
	system ("cls");
	cout <<"Explain Game";
	cout<<"Guess a number between  1 and 20, you have three guesses";
	system ("pause");
	main();
}

void playGame()
{
	int guess;

	int randomNumber = rand()%20 +1;
	system ("cls");

	for (int i=1; i<=3; i++)
	{
		cout <<"Guess The Number";
		cin >> guess;
		cin.ignore();

		if (guess == randomNumber)
		{
			cout << "Congratulations, you got it!";
			cout << "You guessed the number in" <<i<<"tries";
			system("pause");
			return;

		}
		else if (guess > randomNumber)
		{
			cout <<"Your guess is too high  Try again!";
		}
		else if (guess < randomNumber)
		{
			cout<<" Your guess is too low  Try again!";
		}
		else if (i=3)
			cout<<" Sorry, you have no more guesses.";
		system("pause");
		main();
	}
}

bool quitGame()
{
	bool quit;
	char y='y';

	cout<<" Are you sure you want to quit? (y/n)";
	cin >> quit;
	if  (quit==y)
	{
		quit = false;
		return quit;
	}
	else
	{
		quit = true;
		return main();
	}
}

[LB]

C++ is case sensitive. You wrote "quitGame" instead of "QuitGame" (or vice versa).
You should learn how to fix extremely simple errors like these ;)

Also, never call the main function as you are doing on line 108.

The entire "quitGame" function you have can be written like this instead:

bool quiteGame()
{
    char yn = 'y';
    cout << "Are you sure you want to quit? y/n: ";
    cin >> yn;
    return yn == 'y' || yn == 'Y';
}

And in main, you should have everything in a loop and exit the loop if quitGame returns false.

In your original code, the 'quit' boolean was completely useless, because you either assigned to it and returned it immediately, or assigned to it and returned something else after.

[Asif Hirai]

change
cin >> quit;

to

char y;
cout << "Are you sure you want to quit? (y/n) ";
cin >> y;
if(y == 'y'){
   quit = true;
   return quit;
}
else{
   quit = false;
   return true; // or change the return type of main to bool
}

[LB]

@Asif Hirai: it is illegal to have main return anything other than a signed int. And, you should never call main ;) though I have to admit I didn't catch that input-to-bool thing.

[TruYadoo]

How is it "illegal"?

[Moschops]

How is it "illegal"?

It is against the C++ definition. The C++ language is very clearly defined. Anything that violates those rules is termed "illegal". Any compiler that accepts such violations is not a C++ compiler. It's probably very similar to a C++ compiler, but it isn't one.

// or change the return type of main to bool
That would violate the C++ language definition.

[TruYadoo]

lol, illegal as far as the C++ language definition. =) I kinda just have "law" on the brain atm due to a couple criminal justice powerpoints

so moschops, on my thread, i got my program to open My Documents. thx for the help

[Tompoly]

First off thank you everyone for the help! I have fixed the errors and now I am not getting any errors but my guesses are not running through properly and overall the program just is not doing what its suppose to do. I have been working on this for hours now and I just can't get it to work right.

#include <cstdlib>
#include <iostream>
#include <process.h>
#include <time.h>
#include <windows.h>


void showMenu();
void explainGame();
void playGame ();
bool exit();

using namespace std;

int main()
{
	system ("cls");
	
	
	int choice=0;
	

	cout <<"Welcome to my guessing game\n";
	cout <<"Please enter  choice\n";
    cout <<"1. Explain Game\n";
	cout <<"2. Play Game\n";
	cout <<"3. Exit\n";
cin>>choice;	
switch (choice)
	

	{
		case 1: explainGame();
			break;
			
        
		case 2:
			playGame();
			break;

		case 3:
			exit();
		    break;

		default:
			cout << "Choose another number";
			
	}
	system ("cls");
	return 0;
}
void explainGame()
{
	system ("cls");
	cout <<"Explain Game\n\n";
	cout<<"Guess a number between  1 and 20, you have three guesses";
	system ("pause");
	main();
}

void playGame()
{
	int guess;
	
	int randomNumber = rand()%20 +1;
	system ("cls");

	for (int i=1; i<=3; i++)
	{
		cout <<"Guess The Number";
		cin >> guess;
		cin.ignore();

		if (guess == randomNumber)
		{
			cout << "Congratulations, you got it!";
			cout << "You guessed the number in" <<i<<"tries";
			system("pause");
			return;

		}
		else if (guess > randomNumber)
		{
			cout <<"Your guess is too high  Try again!";
		}
		else if (guess < randomNumber)
		{
			cout<<" Your guess is too low  Try again!";
		}
		else if (i==3)
			cout<<" Sorry, you have no more guesses.";
		system("pause");
		main();
	}
}

bool exit()
{
    char yn = 'y';
    cout << "Are you sure you want to quit? y/n: ";
    cin >> yn;
    return yn == 'y' || yn == 'Y';
}

[Moschops]

Do not do this:

main();

Caliing main() is not something you should be doing.