Thread: Having trouble finding Mode in a randomly-generated, 100-element array

Hello, I am in a mid-level C++ course, but I'm pretty rusty with my basics. This course has asked that I create three void functions to:
a) initialize an array of 100 randomly-generated #s (range 1-30);
b) print that array;
c) find the mode(s) and display.

I managed to complete a) and b) with ease, but the crafting of c) has left me completely confused. A friend was helping, but it's been a while since he used C++. I'm supposed to use a second array to count the occurrences of the numbers. Here is the code I have so far:

insert

Code:

// This program generates a 100 element array of random numbers, displays that
// array, then finds the mode(or modes if more than one) and displays it.
#include <iostream>
#include <cstdlib>  // For rand and srand.
#include <ctime>    // For the time function.
#include <iomanip>
using namespace std;


void initialize(int[], int);
void print_array(int[], int);
void Mode(int[], const int, int[], const int);


const int ARRAY_SIZE = 100;
const int MAX_RANGE = 30;


int main()
{
    int Array[ARRAY_SIZE];  //Create an array with 100 elements.
    int second[MAX_RANGE] = {0};  //Create a secondary array for counting.
    initialize(Array, ARRAY_SIZE);
    print_array(Array, ARRAY_SIZE);
    Mode(Array, ARRAY_SIZE, second, MAX_RANGE);
    return 0;
}


void initialize(int nums[], int size)
{
    // Get the system time.
    unsigned seed = time(0);


    // Seed the random number generator.
    srand(seed);


    // Loop to fill the array with random numbers from 1 to 30.
    for (int index = 0; index < size; index++)
    {
        //Generate random numbers from 1 to 30.
        nums[index] = 1 + rand() % MAX_RANGE;
    }
}


void print_array(int nums[], int size)
{
    for (int x = 0; x < size; x++)
    {
        if (x % 10 == 0)    // At the end of ten elements, begin a new line.
        cout << endl;
        cout << setw(2) << nums[x] << "  ";
    }
    cout << endl << endl;
}


void Mode(int nums[], int size, int secondary[], int size2)
{
    //Create a counter array to store occurrences of items in first array.
    int max = 0;


    for(int i = 0; i < size; i++)
    {
        secondary[nums[i]]++;


        if(secondary[nums[i]] > max)
            max = secondary[nums[i]];
    }
    for(int i = 0; i <= size2; i++)
    {
        if(secondary[nums[i]] == max)
            cout << "The mode is: " << secondary[i] << endl;
    }
}

No, you're fine. Thank you very much! That really helped!