Arrays- Introduction:

C-Style One-Dimensional Arrays:

• Boundary checking:

    C++ (or C) does not check an array index to ensure that it belongs to the range for which the array is defined.

 

  ☺Some Important points:

int list[5], *plist[5];

list[5]:   five integers

             list[0], list[1], list[2], list[3], list[4]

*plist[5]: five pointers to integers

            plist[0], plist[1], plist[2], plist[3], plist[4]

• implementation of 1-D array

  list[0]  base address = a

  list[1]    a + sizeof(int)

  list[2]    a + 2*sizeof(int)

  list[3]    a + 3*sizeof(int)

  list[4]    a + 4*size(int)

• Compare int *list1 and int list2[5] in C.
• Same:  list1 and list2 are pointers.
• Difference:  list2 reserves five locations.
• Notations:
• list2 - a pointer to list2[0]
• (list2 + i) - a pointer to list2[i] (&list2[i])
• *(list2 + i) - list2[i]