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

Posted by Josh Sutton
Josh Sutton
161 Points

Help with Array_length.mm

I feel like I have tried everything. I currently need help with this: Using the printf function print the size in bytes of the variable real_numbers. Your output should look like the following: Array real_numbers is x bytes.

I have tried this:

  1. float real_numbers[] = (11.11, 22.22, 33.33, 44.44, 55.55);
  2. printf("float is %ld bytes.", sizeof(float));

What am I doing wrong here

2 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

your array declaration is a bit off. (all you have to do is declare it, not assign any values to it, and if you did the values go between { }, not ( ). )

it should look like this:

float real_numbers[5];

as for your print statement, the string is incorrect.

The challenge needs the output string to be "Array real_numbers is %ld bytes."

you currently have "float is %ld bytes." which is not what the challenge is asking for

Josh Sutton
Josh Sutton
161 Points
Josh Sutton
Josh Sutton
161 Points

That fixed it. Thank you so much.

I actually used {} in my original code.

In the video the guy used float instead of Array though.