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

Posted by Lincoln Sills
Lincoln Sills
1,214 Points

Basic C code won't compile in Treehouse

Program runs and complies as it should in Xcode and returns the correct value although it won't accept it. Please help, thanks

float real_numbers[] = {1.1, 2.2, 3.3, 4.4, 5.5}; printf("float %ld bytes\n", sizeof(float)); printf("Array real_numbers is %ld bytes\n", sizeof(real_numbers)); printf("Array real_numbers can store %ld itmes\n", sizeof(real_numbers)/sizeof(float));

4 Answers

Jason Anello
Jason Anello
Courses Plus Student 94,597 Points

Hey Lincoln,

Your first printf statement isn't asked for in the challenge so I don't know if that will throw it off. You're using \n in your strings instead of a period which could be causing it not to pass.

Also, check your spelling on the last printf statement.

Lincoln Sills
Lincoln Sills
1,214 Points
Lincoln Sills
Lincoln Sills
1,214 Points

Here is my problem again:

Code Challenge: Print the length of the array real_numbers using the sizeof() function. Your output should look like the following: Array real_numbers can store x items.

My Solution:

float real_numbers[] = {1.1, 2.2, 3.3, 4.4, 5.5}; printf("Array real_numbers is %ld bytes.", sizeof(real_numbers)); printf("Array real_numbers can store %ld times.", sizeof(real_numbers)/sizeof(float));

works in Xcode only, Thank you

Jason Anello
Jason Anello
Courses Plus Student 94,597 Points

I didn't recheck the code challenge again but I think the end of the string was items and not times

Lincoln Sills
Lincoln Sills
1,214 Points
Lincoln Sills
Lincoln Sills
1,214 Points

Thank you for the quick response and catching those mistakes but that didn't fix it. I am just moving on, as long as it works in Xcode without any problems it would seem to me that it is ok to just move on. Your thoughts?

Jason Anello
Jason Anello
Courses Plus Student 94,597 Points

I would recommend that you complete the challenges Even if earning the points and badges aren't important to you it's still a learning experience. I know sometimes it may seem like you're jumping through hoops just to satisfy the code checker but I think you'll be a better programmer if you stick with it and figure out what it requires.

I think you'll find that a lot of times in programming things need to be an exact way. So I think it's good practice to read the instructions carefully and make sure that you are providing exactly what is required.

Lincoln Sills
Lincoln Sills
1,214 Points
Lincoln Sills
Lincoln Sills
1,214 Points

I see your logic... thank you for your help and input. That was the problem, I was using times and not items.