Noob Here, need help with "Guess My Number"

chris_bell · 2014-10-24T05:29:54

I have just recently purchased Michael Dawson's book, "Beginning C++ Game Programming" but have come to a road block upon completing chapter two. (I have zero previous knowledge of any programming) In the end of chapter 2, one of Dawson's exercises is as follows: "3. Write a new version of the Guess My Number program in which the player and the computer switch roles. That is, the player picks a number and the computer must guess what it is." On his CD, Dawson supplies the code for the OPPOSITE program (where the user guesses the computer's number). I'm trying to rearrange steps and place the user in the computer's shoes, though I'm stumped...Here's what I _THINK_ I know... -------------------- 1. I need to have the user input an integer number to be guessed... "cin >> theNumber;" 2. I need to have the computer choose random numbers using the "rand()" 3. I need to use a 'do' accompanied by a series of 'if's...the loop must wait for the user to hit enter (or some key), then the computer will choose a random number from say...1-100. If the number is too low, it gives the computer a message saying so, same with if its too High. 4. With each new number guessed, i need to increase the number of tries by 1. ++tries; (where 'tries' is the integer value of the number of tries performed) 5. Need to end loop when computer finds number....also display a "Congrats!" or something -------------------- My biggest problem is understanding how to have the computer "guess" or choose a random number...though I'd like to view the entire program's code Any basic examples of how to accomplish this program are appreciated. This being my first post, I hope not to barge in on this new community if I'm asking too much so soon.... (this post probably could have been alot shorter too lol)

Stompy9999

792

June 29, 2005 01:44 PM

EDIT: Oops never mind, ignore what I said before.

Also, don't you want while(ComGuess != theNumber)? Because you want to end the loop when the player guesses right.

-----------------------------Play Stompy's Revenge! Now!

jperalta

356

June 29, 2005 01:49 PM

Quote:
Original post by chris_bell
thanks for that, i wasn't really sure what to do about obtaining a value each time for comGuess.
now for some reason, though, i'm getting an error on the 'while' line...though i see nothing wrong with it.

} while (comGuess == theNumber);

seems fine to me...

while statements do not have an end ';'

so your line should look like "} while (comGuess == theNumber)" but you probably want to make that a "!=" otherwise it will only continue if the computer gets it right rather than continuing until the computer gets it right.

chris_bell

Author

138

June 29, 2005 01:50 PM

oh, good call on the != . though that while line still gives an error, even when its } while (comGuess != theNumber).
And it's the computer guessing, not the player. That was the assignment.

chris_bell

Author

138

June 29, 2005 01:51 PM

just got the last message while posting. Thanks for the help :D.
Noobs gotta start somewhere lol

EDIT: Hmm..... wow. STILL getting an error.

Line currently looks like so:

} while (comGuess != theNumber)

jperalta

356

June 29, 2005 02:28 PM

What is the error you are getting?

Dave Hunt

4,872

June 29, 2005 02:31 PM

Quote:
Original post by jperalta
[while statements do not have an end ';'

while statements don't, but do-while statements do. The closing ';' is required.

Stompy9999

792

June 29, 2005 03:07 PM

Quote:
Original post by Dave Hunt
Quote:
Original post by jperalta
[while statements do not have an end ';'

while statements don't, but do-while statements do. The closing ';' is required.

I actually put the same thing down, and then checked it in my C++ book. To my suprise, Do-While statements actually have a semi-colon.

-----------------------------Play Stompy's Revenge! Now!

CJWR

180

June 29, 2005 03:20 PM

i don't know if this is what is causing your error or not, but you really should have a return 0; at the very end of the int main() function.

vc++ 6 is just giving me a warning about it, but other compilers might not allow it.

edit: also, while i can compile it, you have some logic errors as well.

Charles Reed, CEO of CJWR Software LLC

CJWR

180

June 29, 2005 03:31 PM

now don't use this unless you understand how it works, but here is a fully functional version.

// Guess My Number 3.0// Have computer guess your number#include <iostream>#include <cstdlib>#include <ctime>using namespace std;int main(){	int theNumber;	int comGuess;	int tries = 0;	int lowest = 1;    //the lowest number the computer should guess 	int highest = 100; //the highest number the computer should guess	cout << "\tWelcome to Guess My Number 2.0!\n\n";	cout << "Please enter a number to be guessed: ";	cin >> theNumber;	do{		comGuess = (highest + lowest)/2;		cout << "\n\nPress Enter to see the Computer's guess...";		cin.get();		//return comGuess;		cout << "The Computer's Guess: " << comGuess << ".\n";		++tries;		if (comGuess > theNumber){			cout << "Too high!\n\n";			highest = comGuess;		}		if (comGuess < theNumber){			cout << "Too low!\n\n";			lowest = comGuess;		}	} while (comGuess != theNumber);	cout << "\nThat's it! The Computer got it in " << tries << " guesses!\n";	return 0;}

remember, learning is the most important part, regardless of what level of learning you're at.

Charles Reed, CEO of CJWR Software LLC

chris_bell

Author

138

June 29, 2005 05:20 PM

sorry for the late response, but i had to run out the house. Thanks for all the replies, i'll study that program and learn from it CJWR. I'm in it for the learning, that's why i didn't just jump to chapter 3 when I couldn't figure this out from the start.

Again, thanks. For a problem with such a simple program it's nice to know you guys are still passionate about helping. Looks like I'll be hanging around here for a while and learning.

Noob Here, need help with "Guess My Number"

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Noob Here, need help with "Guess My Number"

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