/*
 * @topic T0M260 C++ crash course samples 2016
 * @brief Demonstrates std::vector
*/

#include <iostream>
#include <cstdlib>
#include <vector>
#include <string>

// Function prototypes
void display( char* pmessage );
void display( int* pvalue );
void display( int value );
void display( std::vector< int >* pvect );

int main()
{
    const std::string prompt = "How many integers would you like? ";
    std::cout << ( prompt + "\n" );
    int array_size;
    std::cin >> array_size;

    // A vector is a dynamic array that eliminates the need
    // for "new" and "delete" low-level memory management

    // int iarray[ array_size ]; // this is not allowed
    // int* iarray = new int[ array_size ]; // dynamic memory allocation
    // ...use iarray...
    // delete[] iarray;                     // each new requires delete!

    // A vector eliminates new/delete mess: it does it internally
    std::vector< int > iarray( array_size );

    // The vector::data() member function
    // returns address of the memory block allocated by the
    // vector to store the data. This is necessary when passing
    // vector elements to functions which expect a C array as
    // the input:
    iarray.data(); // same as &iarray[ 0 ]

    iarray[0] = 12345;  // vector allows using index to access its elements
    iarray[1] = 11111;
    iarray[2] = 22222;

    display( &iarray[0] );

    display( &iarray );

    system("pause");
    return 0;
}

// Overloaded display() functions

void display( std::vector<int>* pvect )
{
    // print content os the vector
    for ( size_t idx = 0; idx < pvect->size(); ++idx ) {
        std::cout << ( *pvect )[ idx ] << " ";
    }
    std::cout << "\n";
}

void display(char* pmessage)
{
    std::cout << pmessage;
}

void display(int* pvalue)
{
    std::cout << *pvalue << "\n";
}

void display(int value)
{
    std::cout << value << "\n";
}