Arrays in C/C++

Arrays declaration

  int A[20];	// integer array with 20 elements,
		// 0 <= index <= 19
  int B[5][6];	// integer array with 5x6 elements

	// array of arrays

  typedef char String10[11];
  String10 student[30];

Arrays access

    A[4] = 37;
    cout << A[4]; 		// prints 37
    cout << A[4] + A[4]; 	// prints 74

    B[3][2] = 66;
    cout << B[3][2];	

Arrays initialization

    int A[5] = {3, 17, -9, 8 ,2};

    int B[3][2] = 
    {		
	{3, 8}, 
	{5, 8},
	{17, -9}
    }

Examples

1. Initializing an array with a declaration
2. Compute the sum of the elements of the array

A few Warnings

1. No array aggregate operation. Don't do

   	A = B;
   

2. No out-of-bounds index check.
3. By default an array is passed by REFERENCE.

Passing Arrays to Functions

Multiple-Subscripted Arrays