Array of object (class)

Arrays of classes are no different to arrays of any of the built-in types.
You use the [] operator to access the element you want in addition to the . or -> operators to access member functions/vars.

Take an example of strings.

#include <string>
#include <cstdio>
#include <cstdlib>

using std::string;

int main()
{
    int i;
    const int maxItems = 10;
    string someStrings[maxItems];

    for (i=0; i<maxItems; i++)
    {
        someStrings[i] = "TextItem: ";
        someStrings[i] += ('0' + i);
    }

    for (i=0; i<maxItems; i++)
        printf("String_%d is: %s\n", i, someStrings[i].c_str() );

    return 0;
}

An array is a region in memory containing equally sized elements of the same type. These can be objects or literals (integers, characters, floating point, string, boolean, pointer or user defined literals).

The array notation a[n] is convenient language construct that provides access to the element at offset n in the array. The compiler knows the size, and alignment, of each element so you don't need to handle this.
Basically the compier translates a[n] into an address in memory.

A class defines the behaviour of an object, so we can have arrays of objects, but not classes, and an object is just a region of memory.

A class may provide it's own idea about how the array operator should work, but it's usually advisable that the functionality should be conceptually equivalent to a regular array.

Best regards
Espen Harlinn