Objective-c : Arrays

Hi Bryce,

So looking at the code challenge, the task is to print letters a b

In the previous code tasks, you've assigned the characters 'a' and 'b' to the variables alpha and bravo of type char. So if you want to print letters a b, you want to represent the letters 'a' and 'b' with the alpha and bravo variables which we've assigned to the letters array. In objective-c, you use placeholders to represent those variables in a string. In this case, because you want to use char variables, you use the placeholder %c. If it was a string, you could use %@, a float %f, etc. So all you would do it just replace the letters 'a' and 'b' in the string "letters a b" with %c:

char alpha = 'a';
char bravo = 'b';

char letters[2];
letters[0] = alpha;
letters[1] = beta;

printf("letters %c %c", letters[0], letters[1]);

between the quotes, you just write out the string output that you want. When you come to a part of the string that you want represented by a variable, replace that part with the placeholders, %c, %@, %f or whatever you want. You can see the different placeholder variables here: https://developer.apple.com/library/mac/documentation/cocoa/conceptual/Strings/Articles/formatSpecifiers.html

And then after you're done writing out the string you want, you have to follow it up with what those placeholder variables represent. In our case, we placed two placeholders, %c %c. So we have to define what those are: letters[0] and letters[1].

Hope this helps!

Hey Bryce,

I just recently finished this so I can help you out. In your printf statement, you don't need to include the * before letters. Also, when it asks for a and b, they want you to print them via their respective variables. So try something like this:

printf("letters %c %c\n", alpha, bravo);

thank you man!

cool I appericated i.... for the notes

You can also shorten the code up by writing it like this :

char letters[ ] = {alpha, bravo}

printf{" letters %c %c\n", letters[0], letters[1])

this is just makes the code a lot cleaner