ready-only

#include <iostream>
#include <iomanip>
 
using namespace std;
 
void mean(const int[], int);
void median(int[], int);
void mode(const int[], int[], int);
void bubbleSort(int [], int);
void printArray(const int[], int);
 
int main()
{
    const int responseSize = 99;
    int frequency[10] = {0},
         response[responseSize] = {6, 7, 8, 9, 8, 7, 8, 9, 8, 9,
                                   7, 8, 9, 5, 9, 8, 7, 8, 7, 8,
                                   6, 7, 8, 9, 3, 9, 8, 7, 8, 7,
                                   7, 8, 9, 8, 9, 8, 9, 7, 8, 9,
                                   6, 7, 8, 7, 8, 7, 9, 8, 9, 2,
                                   7, 8, 9, 8, 9, 8, 9, 7, 5, 3,
                                   5, 6, 7, 2, 5, 3, 9, 4, 6, 3,
                                   7, 8, 9, 6, 8, 7, 8, 9, 7, 8,
                                   7, 4, 4, 2, 5, 3, 8, 7, 5, 6,
                                   4, 5, 6, 1, 6, 5, 7, 8, 7};
    mean(response, responseSize);
    median(response, responseSize);
    mode(frequency, response, responseSize);
    return 0;
}
 
void mean(const int answer[ ], int arraySize)
{
    int total = 0;
    cout << "*********" << endl << "Srednee" << endl
         << "*********" << endl;
 
    for (int j = 0; j < arraySize; j++)
        total += answer[j];
 
    cout << "Srednee znachenie dlya dannogo rascheta:" << setiosflags(ios::fixed | ios::showpoint)
         << setprecision(4) << (float) total / arraySize << endl << endl;
}
 
void median(int answer[ ], int size)
{
    cout << "*********" << endl << "Mediana" << endl
         << "*********" << endl
         << "Ne sortirovanni massiv:";
 
    printArray(answer, size);
    bubbleSort(answer, size);
    cout << endl << endl << "Sortirovanni massiv:";
    printArray(answer, size);
 
    cout << endl << endl << "Mediana - eto element " << size / 2
         << " is massiva " << endl << size << " sortirovannih elementov. " << endl
         << "Dlya dannogo rascheta mediana: "
         << answer[size / 2] << endl << endl;
}
 
void mode(const int freq[ ], int answer[ ], int size)
{
    int largest = 0, modeValue = 0;
    cout << "*********" << endl << "Moda" << endl
         << "*********" << endl;
 
    for (int rating = 1; rating <= 9; rating++)
        freq[rating] = 0; //cpp|69|error: assignment of read-only location '*(freq + ((unsigned int)(rating * 4u)))'|
 
    for (int j = 0; j < size; j++)
        ++freq[answer[j]];  // cpp|72|error: increment of read-only location '*(freq + ((unsigned int)(((unsigned int)(*
 
    cout << "Otvet" << setw(11) << "Castota"
         << setw(19) << "Gistogramma" << endl << endl << setw(54)
         << "1  1   2   2" << endl << setw(54)
         << "5  0   5   0   5" << endl << endl;
 
    for (int rating = 1; rating <= 9; rating++) {
        cout << setw(8) << rating << setw(11)
        << freq[rating] << "               ";
 
        if (freq[rating] > largest) {
            largest = freq[rating];
            modeValue = rating;
        }
 
        for (int h = 1; h <= freq[rating]; h++)
            cout << "*";
 
        cout << endl;
    }
 
    cout << "Moda - eto naibolee chasto vstechaushiesy znachenie." << endl
         << "Dlya dannogo rascheta moda ravna " << modeValue
         << ", vstrechaetsya " << largest << " raz."
         << endl;
}
 
void bubbleSort(int a[ ], int size)
{
    int hold;
 
    for (int pass = 1; pass < size; pass++)
 
        for (int j = 0; j < size - 1; j++)
 
            if (a[j] > a[j + 1]) {
                hold = a[j];
                a[j] = a[j + 1];
                a[j + 1] =  hold;
            }
}
 
void printArray(const int a[ ], int size)
{
    for (int j = 0; j < size; j++) {
 
        if (j % 20 == 0)
            cout << endl;
 
        cout << setw(2) << a[j];
    }
}