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iOS Objective-C Basics (Retired) Pointers and Memory Array Size and Length

what is wrong?

float real_numbers[5];

printf("Array real_numbers is %ld bytes.\n", sizeof(real_numbers));

printf("Array real_numbers can store %ld items.", sizeof(real_numbers[5]));

4 Answers

Justin Horner
STAFF
Justin Horner
Treehouse Guest Teacher

Hello Rzgar,

To find the number of elements in an array using sizeof you can use sizeof(real_numbers)/sizeof(float).

I hope this helps.

thank you Justin Horner . It solved the issue. I compiled above code also in xcode and got no error therefore I got confused.

Thomas Nilsen
Thomas Nilsen
14,957 Points

Last challenge should look something like this:

printf("Array real_numbers can store %ld items.", sizeof(real_numbers)/sizeof(float));

sorry, I hadn't updated the page, so I didn't see you already received an answer ;)

Thanks Thomas Nelson for your reply :)