an array is essentially a variable which can store a number of values, all stored one after another in memory and all having a certain index;
eg
int numbers[10]; // array of 10 integers, unitialised
int morenumbers[3] = { 27, 4, 1 }; // array of 3 numbers, initialised
int numbers2 [] = { 0, 1, 14, 25 }; // array of 4 numbers, initialised (the [] means the compiler determines the size, in this case 4 as we have asked for 4 numbers
numbers2 is the variable name.
*numbers2 is a pointer to the first in the list (therefore the variable name refers to the head of the array)
Each item can be retreived using the [] operator;
numbers2[0] = 0 // note, the first element is index 0!!
numbers2[1] = 1
numbers2[2] = 14
ect...
arrays can be initialised after they are declared and the best method is a loop eg:
int numbers[5]; // array
char *str; // input string
for(int i = 0; i < 5; i++) // goes from 0 to 4 (as arrays start at 0)
{
cout << "Enter number " << i << " for the array";
cin >> str;
data = atoi(str);
numbers[i] = data;
}
this code will ask the user to input 5 values, which are inserted into the array.
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