NSLog();

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define YES 1
#define NO 0
#define bool int

int randomNumber;

int getRandom();
bool compareGuess(int guess);
int getGuess();

int main (int argc, const char * argv[])
{
    randomNumber = getRandom();

    int guess = 0;

    do
    {
        fflush(stdout);
        guess = getGuess();

        if(guess == 0)
            printf("Quitter! The number was %d.\n\n", randomNumber);
        else if(randomNumber < guess)
            printf("Sorry, too high. Try again.\n");
        else if(randomNumber > guess)
            printf("Sorry, too low. Try again.\n");

    } while (randomNumber != guess && guess != 0);
    

    if(guess == randomNumber)
    {
        printf("You've guessed correctly!");
        printf(" Congratulations!\n");
    }

    return 0;
}

bool compareGuess(int guess)
{
    if(guess == randomNumber)
        return YES;
    else
        return NO;
}

int getRandom()
{
    srandom(time(NULL) );
    return random()%100;
}

int getGuess()
{
    int theGuess;
    printf("Enter a guess: ");
    fflush(stdout);
    scanf("%d", &theGuess);

    if(theGuess < 0)
    {
        printf("=============\n");
        printf("Answer is: %d\n", randomNumber);
        printf("=============\n");
        fflush(stdout);
    }

    return theGuess;
}

9 Comments »

9 Responses to "Learning C"

1. | Reply Eric
   Posted 13 May 2003 at 1:25pm #
   

   #define bool int? C'mon, she's smart...she can handle C99. 🙂

2. | Reply Erik J. Barzeski
   Posted 13 May 2003 at 1:40pm #
   

   Heh, that was as much for me as for her. She's going to learn Cocoa sooner or later, too, so the point of doing that was to do YES and NO and see BOOL as return type.

3. | Reply Buzz Andersen
   Posted 13 May 2003 at 1:40pm #
   

   Congrats to Jamie on joining the cult--soon she will have no life like the rest of us :-). Kidding!!!

4. | Reply Ryan
   Posted 13 May 2003 at 1:55pm #
   

   I never knew about fflush(). Even though I learned C first, I never saw that function call before today. I guess C++ has corrupted us at school. 😉

5. | Reply Nick
   Posted 14 May 2003 at 2:46am #
   

   Ugh, why the global? If you're going to teach someone, start them right off the bat with good habits!

   --Nick

6. | Reply Olivier Scherler
   Posted 14 May 2003 at 5:50am #
   

   Why don't you use your compareGuess function?

7. | Reply Erik J. Barzeski
   Posted 14 May 2003 at 8:22am #
   

   Nick: So that I could demonstrate scope.

   Oliver: Ha, good point. It was used at one point it just said "your guess is wrong." Then we made the app more complex ("too high" or "too low") and we didn't use it. I could modify the code here and put the "too high" and "too low" code down there, but then I'd be cheating.

8. | Reply Nick
   Posted 15 May 2003 at 3:49am #
   

   Fair enough ... I figured you were using it to cover scope ... I just tend to do so just long enough to convince them why it's bad, then make them get rid of it before commiting. 🙂

   --Nick

9. | Reply Tits & Wits
   Posted 17 May 2003 at 2:53am #
   

   printf("Hello World!")

   Barry is full of infinite wisdom. My favorite quote: "Technology is not a destination; it is a journey." Today's journey: Week 1 Day 1 of Sams Teach Yourself C in 21 Days, Sixth Edition. I started learning C from Erik...