2010 Lab-9

Elements of this lab...
   . structured data
   . dynamic memory allocation
   . pointers
   . functions



Homework...

Jump to homework section  <--- click



Program name: cars.cpp

  $ cd 2010
  $ ./lab-start.sh
  $ cd 9

Here is a structure named Car.

struct Car {
    string carMake;
    string carModel;
    int yearModel;
    double cost;
};

Define an array of 35 of the Car structure variables.

Initialize the first two eleiments with the following data:

Make     Model      Year   Cost
------   ---------  ----   -------
Toyota   Rav-4      2017   $33,500
Subaru   Crosstrek  2019   $29,000

Write a loop that will step through the array you defined, displaying
the contents of each element.

sample output

lab-9 cars

Toyota   Rav-4      2017   $33,500
Subaru   Crosstrek  2019   $29,000


Estimated time to complete: 15 minutes.



Program name: myarray.cpp

in your program...

Write a function that dynamically allocates an array of integers.

The function will accept an integer argument indicating the number of
elements to allocate.

The function will return a pointer to the array.

Call your function from main().

in main...

Fill the array with single-digit numbers, then display them neatly going
across the screen, not downward, no spaces.

Delete the array before exiting the program.

sample output

lab-9 my array

Enter the number of array elements: 32

72618596058905827184750382746154


Estimated time to complete: 25 minutes.



Program name: reverse.cpp

Reverse Array

Write a function that accepts an int array and the array's size as arguments.

You may use this array containing the first 10 digits of pi.

int arr[10] = { 3,1,4,1,5,9,2,6,5,3 };

The function will create a copy of the array, except that the element values
will be reversed in the copy.

The function will return the address of the new array.

No cout allowed in the function!
Print only from main().

sample output

lab-9 reversed array

original: 3141592653
reversed: 3562951413


Estimated time to complete: 20 minutes.




Program name: nobrackets.cpp

Prompt the user to enter their name.

Allocate an array of integers the same size as the user's name entered.

Fill the array elements with the ASCII values of the name characters.

Use these function prototypes in your program.

  Allocate and return an int array...
  int *makeArray(char *name);

  Fill the int array with ACSII values from name...
  void fillArray(char *name, int *arr, int n);

  Display the int array values...
  void displayArray(int *arr, int n);

Do not use any [] operators in your 3 functions.
The makeArray() function can use brackets for the new command only.

If you have an array named arr...
The first element of the array is at:  *(arr + 0)
The second element of the array is at: *(arr + 1)
You take it from there.

sample output

lab-9 no brackets program

Please enter your name: Frederico

Your letter values are: 70 114 101 100 101 114 105 99 111 


Be sure to delete the memory you allocated before the program ends.

Estimated time to complete: 30 minutes.




HOMEWORK  HOMEWORK  HOMEWORK  HOMEWORK  HOMEWORK  HOMEWORK  HOMEWORK  HOMEWORK

Program name: 2010/9/pizza.cpp

This program is required!

Homework program by Brooklyn  <--- click there


Program name: 2010/9/shuffle.cpp

In your program, do the following...

1. In main(), dynamically allocate an integer array of size 52.

2. Fill the array with the values 1 through 52, in order.
   This array is a deck of playing cards.

3. Write a function named shuffle that will shuffle the deck of cards.

4. Pass the array and the number of cards in the deck to shuffle function.

5. Your function will have a loop that runs at least 10,000 iterations.

6. Each loop iteration
     - Generate 2 random numbers from 0 to 51.
     - These numbers are indices in the array.
     - Swap the two array elements using the two random indices.
     - Use the swap code we learned to do in class.
     - If the 2 random indices are equal, don't swap, but continue looping.
     - You may use the continue statement in your loop.
	 
7. Return from your function back to main.

8. Deal the first 5 cards from the deck.

9. When displaying the card numbers, mod the number by 13, then display it.
   The numbers represent cards such as Ace, 2, 3, King, etc.

10. Inside your function, try not to use the [] operator.


sample output


Homework-9  Deal one hand of poker

Creating deck now.
First 5 cards: 1 2 3 4 5
Shuffling deck now.
Dealing 5 cards: 5 8 1 8 13 


Note:
Some cards can have the same number because we are modding by 13.
52/13 = 4
Modding by 13 gives us 4 of each card number, like a real deck of cards.

Estimated time to complete this program: 30 minutes.