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Array Manipulation in Cpp

Updated on April 20, 2009
/******************************************************************************
 * Array Stuff                                                       main.cpp *
 *                                                                            *
 * Author:                                                      *
 *                                                                            *
 *                                                                            *
 * Abstract: This project illustrates techniques for manipulating arrays.     *
 *                                                                            *
 * 1. An array indexes from zero.                                             *
 * 2. The compiler doesn't care if your index is out of range.                *
 * 3. When stored in RAM, an array is guaranteed to be contiguous.            *
 * 4. Rule to remember: an array reference without an index generates the     *
 *     address of the first element of the array. Memorize this rule.         *
 *                                                                            *
 *                                                                            *
 *                                                                            *
 *                                                                            *
 *                                                                            *
 ******************************************************************************/
#include <iostream>

using namespace std;

void main()
{
//    A local variable, therefore it's not in a known state.
    char intAlpha[10];    // We have intAlpha[0] through intAlpha[9]

//    Enumerate the array with a loop. Note that the array is UNinitialized.
    for (int i = 0; i < 10; i++) cout << intAlpha[i];

//    What happens if we go beyond the dimensions of the array?
//    intAlpha[10] = 42;    // oops. Will this compile?

//    Array notation
    intAlpha;        // This is the address of the first element of the array
    intAlpha[0];    // This is the value of the first element in the array
    *intAlpha;        // This is also the value of the first element in the array
                    //  The * is called the 'dereference' operator, when used in this context

}


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