1. Classes

#include <cstdlib>  // Standard General Utilities Library
#include <iostream> // Input output stream
#include <ctime>    // for random number generation
#include <stdio.h>  // printf library
#include <string>
#include <limits>   // cin.ignore(numeric_limits<streamsize>::max(),'\n');
#include <fstream>  // File input and output.
#include <cmath>    // pow.
#include <cstring>
using namespace std;

// Classes
class arrays
{
private:
    int array_size;
public:
    int intArray[100];
    void reset();
    void addToArray(int);
    void deleteFromArray(int);
    void print();
    int sizeOfArray(){return array_size;}

};

// Methods
void arrays::reset()
{
    for (int i = 0; i < 100; i++) intArray[i] = 0;
    array_size = 0;
}

void arrays::addToArray(int var)
{
    intArray[array_size] = var;
    array_size++;
}

void arrays::deleteFromArray(int index)
{

    if (index < 1 || index > array_size)
        cout << "Wrong index" << endl;
    else
    {
        if (index == array_size)
        intArray[index-1] = 0;
        else
        {
            for (int i = index-1; i < array_size; i++)
            {
                intArray[i] = intArray[i+1];
            }
        }
        array_size--;
    }
}

void arrays:: print()
{
    for (int i = 0; i < array_size; i++)
        cout << intArray[i] << " ";
    cout << endl;
}

// Function prototypes

// Main program
int main(int argc, char *argv[])
{
    arrays A;

    A.reset();
    for (int i = 0; i < 10; i++) A.addToArray(i+1);
    A.print();

    A.deleteFromArray(10);
    A.print();

    A.deleteFromArray(3);
    A.print();

    A.deleteFromArray(-5);
    A.deleteFromArray(50);
    A.print();

    cout << " " << endl;
    //system ("PAUSE");
    //return EXIT_SUCCESS;
    return 0;
}