struct your stuff

main.c

//
//  main.c
//  StructuredObjects
//
//  Created by john salyer on 12/4/12.
//  Copyright (c) 2012 Josef Salyer. All rights reserved.
//

#include <stdio.h>
//#include <stdbool.h>  //this is what you use if you are just using C, but we're not
#include <objc/objc.h>  //required for boolean (true/false) type

// define our structure
typedef struct OVEN
{
    BOOL    isOn;           //a boolean is really an integer, shhhh don't tell anyone
    float   temperature;
    int     timer;
    
} OVEN;

typedef struct PIZZABOX
{
    float   howMuchPizzaIsLeft; //1.00 after eating it's .25
    BOOL    isHot;  // true or false, 1 or 0, YES or NO
    BOOL    isScrumptious;
    float   deliveryTime;
    
} PIZZABOX;


int main(int argc, const char * argv[])
{
    // create an 'instance' of our pizza box
    PIZZABOX myPizzaBox =
    {
        .howMuchPizzaIsLeft = .25,
        .isHot = YES,
        .isScrumptious = YES,
        .deliveryTime = 30.5
    };
    
    printf("howMuchPizzaIsLeft: %f, isHot: %d, isScrumptious: %d, deliveryTime: %f", myPizzaBox.howMuchPizzaIsLeft, myPizzaBox.isHot, myPizzaBox.isScrumptious, myPizzaBox.deliveryTime);
    // %f = float
    // %d = digit

    
    // %s = string (table this)
        
    // create an 'instance' of our oven
    OVEN myOven =
    {
        .isOn        = YES,
        .temperature = 325.6,
        .timer       = 90
    };

    //print the status of our oven                
    printf("isOn: %s, temperature: %f, timer: %d \n",
           (myOven.isOn) ? "YES" : "NO",   //OMG!!! TERNARY OPERATOR!
           myOven.temperature,
           myOven.timer);

    //turn the oven off
    myOven.isOn = NO;
    
    //print the status of our oven showing it's off
    printf("isOn: %s, temperature: %f, timer: %d \n",
           (myOven.isOn) ? "YES" : "NO",
           myOven.temperature,
           myOven.timer);
    
    
    /*
     
     Now all that printing seems a little annoying
     
     
     */
    
    
    return 0;
}