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

Posted by chase cochran
chase cochran
1,103 Points

Do i have the correct format character?

float real_numbers[5]; printf("real_numbers %ld bytes", sizeof(real_numbers)); printf("float %ld bytes", sizeof(float)); printf("Array real_numbers %ld bytes", sizeof(real_numbers)/ sizeof(float));

I keep being told i dont have the correct format character and treehouse reminds me that i should be using %ld but I am?

array_length.mm 
float real_numbers[5];
printf("real_numbers %ld bytes\n", sizeof(real_numbers));
printf("float %ld bytes\n", sizeof(float));
printf("Array real_numbers %ld bytes\n", sizeof(real_numbers)/ sizeof(float));

2 Answers

Joe Ramirez
Joe Ramirez
Courses Plus Student 14,366 Points

Hey,

You pretty much have to code down except for some minor things. Just needed the "Array" in front of real_numbers and a "." after bytes on the second and fourth line of code. As far as the 3rd line "printf("float %ld bytes\n", sizeof(float));" you wouldn't need that because that is essentially your second line of code 'printf("Array real_numbers is %ld bytes.", sizeof(real_numbers));'

You have to type everything to the "T" or else the code challenges wont pass you, hope that helps.

float real_numbers[5]; Challenge 1 printf("Array real_numbers is %ld bytes.", sizeof(real_numbers)); Challenge 2 printf("Array real_numbers can store %ld items.", sizeof(real_numbers)/sizeof(float)); Challenge 3