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Michael Reining
10,101 PointsPlease help stuck with simple array challenge - print the size in bytes of "real_numbers" array
The challenge is:
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."
My input is:
float real_numbers[5];
printf("Array realy_numbers is %ld bytes.\n", sizeof(real_numbers));
When I enter the above code into Xcode it correctly prints the statement and tells me that the array is 20 bytes.
The error message says:
That was not the correct string. Do you have the correct format character? sizeof(real_numbers) returns a long. That format character is '%ld'.
Would appreciate some help so I can proceed and pass this challenge.
Lukasz R
707 PointsWhat's the exact error code from web-editor? :)
Michael Reining
10,101 PointsThat was not the correct string. Do you have the correct format character? sizeof(real_numbers) returns a long. That format character is '%ld'.
Lukasz R
707 PointsYou have typo there: realy_numbers instead of real_numbers :)
Michael Reining
10,101 PointsDoh! Thank you so much. No wonder that Xcode let it pass. Really appreciate your help
Lukasz R
707 PointsNo prob :) Just finished my 'objective-c basics' and had some time before proceeding to next steps :)
4 Answers
Michael Reining
10,101 PointsLesson: Pay more attention to typos in strings. ;)
Jin Jiang
273 Pointsfloat real_numbers []= {1, 2, 3, 4, 5}; printf("Array real_numbers is %ld bytes.", sizeof(real_numbers)/sizeof(float)); that's what i typed, what's wrong with this one?
dungeonkeeperhf
3,272 Pointsfloat is not a whole number, it's a decimal or fraction like 0.3 or 0.56.
Chris Atlas
2,038 Pointscan someone help me find my bug?
float real_numbers[5] = {2.1, 1.2, 2.3, 3.3, 4.5}; printf("array real_numbers %ld bytes\n", sizeof(real_numbers));
Cody Vanleeuwen
294 Pointsi don't think there is any need to make up those numbers,
real_numbers[5];
printf("Array real_numbers is %ld bytes.\n", sizeof(real_numbers));
Michael Reining
10,101 PointsMichael Reining
10,101 PointsAlso, if anyone knows how to add a proper line break with markdown in post above please let me know so I can leave questions / comments that are more readable.