Question

unsigned long long int a[4][10] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,37,38,39,40};
printf("%lu",a); //5120 this is given

printf("%lu",a+2); //5280 since a is 80 bytes, and 2*80 = 160, and 5120 + 160 = 5280

printf("%lu",a[2]); //also 5280

printf("%lu",*(a+2)+9); //answer is 5352

I don't understand how the answer is 5352

@photonics

Answer 1

took me a while but i figured it out

Answer 2

essentially the issue at play is that you're doing pointer arithmetic (something we never learned), but you have an array which is a pointer of pointers (in a sense) and you've dereferenced the pointer once

Answer 3

printf("%lu",*(a+2)+9); //answer is 5352
so *(a+2) would yield address 5280, but as an unsigned long long is 8 bytes having already dereferenced your pointer you get 5280+8*9=5352

Answer 4

admittedly I probably would not get this question correct on an exam, but hey, i already made it through the exams that would ask :D

Answer 5

and if I dereference that entire thing

printf("*lu*, *(*a+2)+9);

that would be *(5352) which is the content at memory location 5352.
right?

Answer 6

Huh, it was 30 on the exam.

Answer 7

doing math is hard

Answer 8

okay well yeah I get the idea at least.

Answer 9

i mean you get the idea

Answer 10

the issue is that on an exam you have to do it exactly and not just the idea

Answer 11

but that's not my problem *shrug*

Answer 12

Have you done R-values and L-values before?

Answer 13

yeah but i don't remember them

Answer 14

but hey i never even learned pointer arithmetic sooo

Answer 15

okay xd. I'll keep that in mind.

Answer 16

I actually didn't know that an array in C was an array of pointers.

Answer 17

it's not, but you can treat it as such

Answer 18

it's really a single pointer wherein data is assumed to be stored in row major order

Answer 19

Rhett is showing his work in simplifying (u22127.9 + 5.2) u2212 1.4.

Step 1: (5.2 u2212 7.9) u2212 1.4
Step 2: 5.2 u2212 (7.9 + 1.4)
Step 3: 5.2 u2212 (9.3)
Step 4: u22124.1

Which statement is true? (1 point)

In step 1, Rhett used the distributive property.

In step 2, Rhett used the associative property.

In step 3, Rhett used the commutative property.

In step 4, Rhett's answer is incorrect.

Answer 20

Brenda earns 1,700 per month after taxes she is working on her budget and has the

Answer 21

Lee y empareja la forma correcta del verbo saber o conocer. Read and match the correct form of the verbs saber and conocer.

Answer 22

Change the verb to the present perfect. (clue: there are two parts to the verb).

You may copy and paste the accented and special characters from this list

Answer 23

Is Billie Eilish and Lil Xan related

Answer 24

Select the correct preposition, por or para, in order to complete the sentence.

Tuve la oportunidad de visitar unos pau00edses increu00edbles e inolvidable

Answer 25

Write the correct form of the verb to complete the sentence. You may copy and paste the accented and special characters from this list if needed: u00c1, u00

Answer 26

Read the paragraph and choose the correct command.

El cliente del restaurante le pide al mesero su recomendaciu00f3n del menu00fa.

Answer 27

se ayudan (reciprocal)

A) Mis padres ________en la puerta del aeropuerto cuando se ven.

Answer 28

Mavity furniture and s having a sale this weekend

Answer 29

Using an algebraic rule, describe a translation 2 units to the left.

A.
2004-01-04-02-00_files/i0150000.

Answer 30

Change the verb to the future perfect. (clue: there are two parts to the verb)

You may copy and paste the accented and special characters from this list if

Answer 31

Lee y escribe la palabra con la forma correcta del verbo en espau00f1ol. Read and write the correct form of the verb in Spanish.

Answer 32

Actualmente el Inti Raymi es una representaciu00f3n teatral; millones de cusqueu00f1os y turistas de todas partes del mundo se dan cita a este acontecimient

Answer 33

Paramecium, shown here, possess ___________ that help counteract the effects of o

Answer 34

Escoge las formas correctas de los verbos usando el futuro o la combinaciu00f3n de ir + a + infinitivo.

Answer 35

Lee el pu00e1rrafo y escribe un mandato dirigido a la audiencia apropiada segu00fan la lectura.

Answer 36

Read the passage.

Jaime adored summers in the mountains. With every sunrise, she found herself drifting further and further away from the crush of traffic

Answer 37

Markets distribute goods and services based on _____.

revenue
price
profits

Answer 38

Match the description with the correct civilization.

Match Term

Los arcos son una gran parte de la arquitectura colonial.