meamed1.cpp

//*****************************************
//Program : Mean, Median, Mode dan range!.
//*****************************************

/*header iostream berisi prototype untuk standar input dan output
jadi agar perintah cout dapat digunakan, maka header ini harus ditulis*/

#include <iostream>
using namespace std;

/*header stdlib berisi prototype yang berfungsi salah satunya untuk alokasi memori, dan random number*/
#include <stdlib.h>
//header math.h berisi prototype yang berfungsi untuk fungsi matematika
#include <math.h>

double avg(double *nums, unsigned int choice);    //cari average
double sort(double *nums, unsigned int choice);   //urutin nomor
double median(double *nums, unsigned int choice); //cari median
void mode(double *nums, unsigned int choice);     //menentukan mode
double range(double *nums, unsigned int choice);  //hitung range
void work(double *nums, unsigned int choice);
int main()
{
    unsigned int choice = 1;
    double *nums = NULL; //pointer dikosongkan terlebih dahulu
    char yn = 'y';
    cout << endl
         << endl
         << "\t\t\tMean, Median, Mode\n\n\n";
    cout << "berapa banyak angka yang akan dicari rata-ratanya? ";
    cin >> choice;
    unsigned int temp = choice;
    if (choice < 2) /*jika angka yang diinput lebih kecil dari 2, maka tidak bisa cari average*/

    {
        cout << endl
             << "Error: masukkan minimal 2 angka." << endl;

        exit(0);
        /*berfungsi untuk keluar dari program, dimana kita memberikan nilai 0, misalnya exit(0), pernyataan exit dapat dijalankan apabila kita menambahkan header stdlib.h */
    }
    if (!(nums = new double[choice])) //pointernya dialamatkan ke new double array
    {                                 // jika pointernya tidak bisa masuk ke memori maka programnya keluar

        cout << endl
             << "alokasi memori gagal.";

        exit(1);
    }
    for (int x = 0; temp > 0; x++)
    {
        cout << "\n\n input nilai untuk cari averagenya (satu persatu): ";

        cin >> nums[x];
        temp--;
    }
    cout << "\n\nThanks.\n\n";

    sort(nums, choice);
    cout << endl
         << endl
         << " \t\t\t Mean, Median, Mode v1 \n\n";
    cout << "Mean:\t\t" << avg(nums, choice) << "\n";
    cout << "Median:\t\t" << median(nums, choice) << "\n";
    mode(nums, choice);
    cout << "Range:\t\t" << range(nums, choice) << "\n\n";
    work(nums, choice);
    delete[] nums;
    cout << "\n\nmau lakukan lagi gak?(y or n): ";
    cin >> yn;
    if (yn == 'y' || yn == 'Y')
    {

        main();
    }
    return 0;
}
//Tahap Penulisan Program Paragraf Rata-Rata

double avg(double *nums, unsigned int choice)
{
    unsigned int y = 0;
    double x;
    for (x = 0; choice > y; y++)
    {
        x += nums[y];
    }
    return (x / choice); //dibagi berapa banyak angka yang dimasukkan
}

//Tahap Penulisan Program Paragraf Median

double median(double *nums, unsigned int choice)
{
    double n = 0;
    long hold = 0;
    long other = 0;
    double holder = 0;
    double m = 0;
    if (choice % 2) //jika angkanya ganjil maka angka yang tengah adalah median
    {
        n = (choice / 2); //cari angka tengahnya berapa
        n += .5;          //menambahkan 0.5

        holder = nums[hold]; //holder = the # disimpan di nums[hold]
    }
    else
    {
        hold = (choice / 2);    //kalau nilai choice genap maka nilai hold=angka tengah yang paling besar
        other = (hold - 1);     //other adalah angka tengah yang paling kecil
        n = nums[hold];         //n itu menyimpan nilainya hold
        m = nums[other];        //m itu menyimpan nilainya other
        holder = ((n + m) / 2); //menghitung hasil rata-ratanya
    }
    return holder; //mengembalikan nilai average
}
//Tahap Penulisan Program untuk fungsi pengurutan

double sort(double *nums, unsigned int choice)
{
    unsigned int n = 0, k = 0;
    double swap = 0;
    for (n = choice - 1; n > 0; n--)
    {
        for (k = 0; k < n; k++)
        {
            if (nums[k] > nums[k + 1])
            {
                swap = nums[k];
                nums[k] = nums[k + 1];
                nums[k + 1] = swap;
            }
        }
    }
    return *nums;
}

//Tahap Penulisan program fungsi mode

void mode(double *nums, unsigned int choice)
{
    unsigned int index;
    int count = 0;
    int max = 0;
    for (index = 0; index < choice; index++)
    {
        if (nums[index] == nums[index + 1])
            count++;
        else
        {
            if (count > max)
                max = count;
            count = 0;
        }
    }
    count = 0;
    for (index = 0; index < choice; index++)
    {
        if (nums[index] == nums[index + 1])
            count++;
        else
        {
            if (count == max)
                cout << "Mode(s):\t" << nums[index] << "\n";
            count = 0;
        }
    }
}
double range(double *nums, unsigned int choice)
{
    double range = (nums[choice - 1] - nums[0]); //range = angka yang paling besar kurangin sama angka yang paling kecil
    return range;
}

//Tahap Penulisan Program untuk fungsi work

void work(double *nums, unsigned int choice)
{
    cout << "\nWork:\n";
    for (unsigned int x = 0; x < choice; x++)
    {
        if (x != choice - 1)
        {
            if (x == 0)
            {
                cout << "\t";
            }
            if (x % 5 == 0)
                cout << endl
                     << "\t";
            cout << nums[x] << ", ";
        }
        if (x == choice - 1)
        {
            if (x % 5 == 0)
                cout << endl
                     << "\t";
            cout << nums[x] << ".";
        }
    }
    cout << "\n\nRange\nWork:";
    cout << "   " << nums[choice - 1] << " - " << nums[0] << " = " << nums[choice - 1] - nums[0] << "\n";
}