Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Kamran Ismayilov
Kamran Ismayilov
5,753 Points

Objective-C Basics/arraylength

What should I do???

array_length.mm
float real_numbers[5];
printf("Array real_numbers is %ld bytes", sizeof(real_numbers));
printf("Array real_numbers can store %ld items", sizeof());

1 Answer

Steven Jemmott
Steven Jemmott
8,109 Points

Since you know the size of the array in bytes sizeof(real_numbers), what you now need to find is how many bytes are in a float which would be calculated by sizeof(float). The array holds float variables. You know the size of the array in bytes. You also know the amount of bytes in one float variable.

Therefore, your array can hold sizeof(real_numbers)/sizeof(float) items.