Reading Assignment

read up to multidimensional arrays
cplusplus



accessing the elements of an array
the most common method for simple programs is to use the index operator
it is basically a fancy function

given 
int myarray[] = {5,10,15,20,25,30,35,40};


you can use the index operator 


cout <<  myarray[0] << endl; // this will display the first value in the array, 5

myarray[2] = 66; this will assign the 3rd value in the array to be 66;

we can use the index operator [] to get or set an element of the array


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you can also use pointer arithmatic.
we like to call the thing we created above and array... 
but "myarray" is just a pointer, thats it, nothing special at all



it does allocate some memory  as well, in this case a piece of memory large enough to store 8 integers
myarray is set to the address of that piece of memory




cout << myarray[0] << endl; // prints out the first value in the array  

cout << *myarray << endl; // prints out the first value in the array     * before a pointer will retrieve the value it points to 



cout << myarray[4] << endl; // prints out the fifth value in the array  

cout << *(myarray +4) << endl; // prints out the first value in the array     * before a pointer will retrieve the value it points to 

*(myarray+3) = 33; // set the 4th value in the array to 33

 myarray+0   is a pointer to the 1st value
 myarray+1   is a pointer to the 2nd value
 myarray+2   is a pointer to the 3rd value
 myarray+3   is a pointer to the 4th value
 myarray+4   is a pointer to the 5th value
 myarray+5   is a pointer to the 6th value


// print the values in the array with out using [] 
 for (int loop =0;loop <8 ; loop++)
    cout << "element number " << loop << " in the array has a value of " << * (myarray + loop) << endl;

// now with using []
 for (int loop =0;loop <8 ; loop++)
    cout << "element number " << loop << " in the array has a value of " << myarray[loop] << endl;