Question

Write a C++ program that simulates a lottery. The user will select 5 numbers 0 through 9 and put this in an array. Then these user numbers are compared to the random numbers the computer generated. The program will display both the computer random number and below the user selected numbers. The program will tell the user how many matches are made. If the user guesses all five you let them know they are the grand winner.

Here is the required starting code below. You are to finish the project by completing the required functions.

HINT Just copy and past the following code and partially done functions to your project and start from there.

// Lottery Application

#include <iostream>

#include <iomanip>

#include <cstdlib>

#include <ctime>

using namespace std;

const int ARRAY_SIZE = 5;

const int MAX_RANGE = 10;

// Function prototypes

void generateNumbers(int [], int);

void getUser(int [], int);

int findMatches(int [], int [], int);

void displayValues(int [], int [], int);

int main()

{

   int lottery[ARRAY_SIZE]; // Lottery numbers

   int user[ARRAY_SIZE]; // User's numbers

   int numMatches; // Number of matches

   // Generate the random lottery numbers.

   generateNumbers(lottery, ARRAY_SIZE);

   // Get the user's numbers.

   cout << "Enter five numbers 0 through 9 for lottery numbers" << endl;

   getUser(user, ARRAY_SIZE);

   // Get the number of matching numbers.

   numMatches = findMatches(lottery, user, ARRAY_SIZE);

   // Display the lottery and user numbers.

   displayValues(lottery, user, ARRAY_SIZE);

   // Display the number of matching numbers.

   cout << "You matched " << numMatches << " numbers.\n";

   // Determine whether the user won the grand prize.

   if (numMatches == 5)

cout << "Congratulations! You're the grand prize winner!!\n";

   return 0;

} // end main

//**********************************************

// Function generateNumbers.

// This function generates random numbers

// and stores them in the lottery array.

//**********************************************

void generateNumbers(int lottery[], int size)

{

   // Seed the random number generator.

   srand(time(NULL));

   // Generate the random numbers.

   cout << "normally do not see this, added to help debug" << endl;

   for (int i = 0; i < size; i++)

   {

lottery[i] = 0 + rand() % MAX_RANGE;

cout << " lottery[" << i << "] = " << lottery[i] << " ";

//added to help do checking normally do not see this <wink>

   }

   cout << endl << endl;

} //end generateNumbers

//**********************************************

// Function getUser.

// This function gets the user's lottery picks.

//**********************************************

void getUser(int user[], int size)

{

   // Get the user's picks.

}

//**********************************************

// Function findMatches.

// This function finds the number of the user's

// values that match the lottery numbers. The

// number of matches is returned.

//**********************************************

int findMatches(int lottery[], int user[], int size)

{

}

//**********************************************

// Function displayValues. *

// This function displays the values in the *

// lottery array and the user array. *

//**********************************************

void displayValues(int lottery[], int user[], int size)

{

}

/* proof

normally do not see this, added to help debug

lottery[0] = 7 lottery[1] = 0 lottery[2] = 9 lottery[3] = 5 lottery[4] = 6

Enter five numbers 0 through 9 for lottery numbers

Number 1: 4

Number 2: 0

Number 3: 9

Number 4: 5

Number 5: 2

Lottery numbers:

   7 0 9 5 6

Your numbers:

   4 0 9 5 2

You matched 3 numbers.

///////////////////////

normally do not see this, added to help debug

lottery[0] = 9 lottery[1] = 5 lottery[2] = 6 lottery[3] = 0 lottery[4] = 9

Enter five numbers 0 through 9 for lottery numbers

Number 1: 9

Number 2: 5

Number 3: 6

Number 4: 0

Number 5: 9

Lottery numbers:

   9 5 6 0 9

Your numbers:

   9 5 6 0 9

You matched 5 numbers.

Congratulations! You're the grand prize winner!!

*/

Answer 1

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
using namespace std;
const int ARRAY_SIZE = 5;
const int MAX_RANGE = 10;

// Function prototypes
void generateNumbers(int [], int);
void getUser(int [], int);
int findMatches(int [], int [], int);
void displayValues(int [], int [], int);

int main()
{
    int lottery[ARRAY_SIZE]; // Lottery numbers
    int user[ARRAY_SIZE]; // User's numbers
    int numMatches; // Number of matches

    // Generate the random lottery numbers.
    generateNumbers(lottery, ARRAY_SIZE);

    // Get the user's numbers.
    cout << "Enter five numbers 0 through 9 for lottery numbers" << endl;
    getUser(user, ARRAY_SIZE);

    // Get the number of matching numbers.
    numMatches = findMatches(lottery, user, ARRAY_SIZE);

    // Display the lottery and user numbers.
    displayValues(lottery, user, ARRAY_SIZE);

    // Display the number of matching numbers.
    cout << "You matched " << numMatches << " numbers.\n";

    // Determine whether the user won the grand prize.
    if (numMatches == 5)
        cout << "Congratulations! You're the grand prize winner!!\n";

    return 0;
} // end main

/**********************************************

// Function generateNumbers.

// This function generates random numbers

// and stores them in the lottery array.

//**********************************************/
void generateNumbers(int lottery[], int size)
{
   // Seed the random number generator.
   srand(time(NULL));

   // Generate the random numbers.
   cout << "normally do not see this, added to help debug" << endl;

   for (int i = 0; i < size; i++)
   {
        lottery[i] = 0 + rand() % MAX_RANGE;
   }
   cout << endl << endl;
} //end generateNumbers

//**********************************************

// Function getUser.

// This function gets the user's lottery picks.

//**********************************************
void getUser(int user[], int size)
{
    for(int i = 0; i < size; i++)
    {
        cout << "Number " << (i + 1) << ": ";
        cin >> user[i];
    }
}

//**********************************************

// Function findMatches.

// This function finds the number of the user's

// values that match the lottery numbers. The

// number of matches is returned.

//**********************************************
int findMatches(int lottery[], int user[], int size)
{
    int matches = 0;
    for(int i = 0; i < size; i++)
    {
        if(user[i] == lottery[i])
            matches++;
    }
    return matches;
}

//**********************************************

// Function displayValues. *

// This function displays the values in the *

// lottery array and the user array. *

//**********************************************
void displayValues(int lottery[], int user[], int size)
{
    // displaying the lottery numbers
    cout << endl << "Lottery numbers:" << endl;
    for(int i = 0; i < size; i++)
    {
        cout << lottery[i] << " ";
    }
    cout << endl;

    // displaying the user numbers
    cout << "Your numbers:" << endl;
    for(int i = 0; i < size; i++)
    {
        cout << user[i] << " ";
    }
    cout << endl << endl;
}

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