swap.cpp

#include <iostream>
#include <string>
#include <limits>

using namespace std;

#define MINIMUM_SIZE 2
#define MAXIMUM_SIZE 125

void dumpArray(double input[], int inputSize)
{
    for (int i = 0; i < inputSize; i++)
    {
        cout << "position " << i << ": " << input[i] << endl;
    }
}
int main()
{
    int arraySize,
        currentPosition = 0,
        i;

    double *arrayFromDoubles,
           *maximum,
           *minimum,
           tempSwap;

    cout << "Please enter array size between "
         << MINIMUM_SIZE
         << " and "
         << MAXIMUM_SIZE
         << endl;

    while (!(cin >> arraySize) || arraySize < MINIMUM_SIZE || arraySize > MAXIMUM_SIZE)
    {
        cin.clear();
        cin.ignore(numeric_limits<streamsize>::max(),'\n');
        cout << "Please input a proper integer number between "
             << MINIMUM_SIZE
             << " and "
             << MAXIMUM_SIZE
             << ", thank you!: "
             << endl;
    }

    arrayFromDoubles = new double[arraySize];

    while (currentPosition < arraySize)
    {
        cout << "Please enter element on position ";
        cout << currentPosition
             << endl;
        while(!(cin >> arrayFromDoubles[currentPosition]))
        {
            cin.clear();
            cin.ignore(numeric_limits<streamsize>::max(),'\n');
            cout << "Please input a proper real number, thank you!: "
                 << endl;
        }
        currentPosition++;
    }

    minimum = maximum = arrayFromDoubles;

    for (i = 1; i < arraySize; i++)
    {
        if (arrayFromDoubles[i] > *maximum)
        {
            maximum = &arrayFromDoubles[i];
        }
        else if(arrayFromDoubles[i] < *minimum)
        {
            minimum = &arrayFromDoubles[i];
        }
    }

    cout << "The inputed array:"
         << endl;
    dumpArray(arrayFromDoubles, arraySize);

    tempSwap = *maximum;
    *maximum = *minimum;
    *minimum = tempSwap;

    cout << "The inputed array after swapping:"
         << endl;
    dumpArray(arrayFromDoubles, arraySize);

    delete[] arrayFromDoubles;
    arrayFromDoubles = 0;
    return 0;
}