Com2 (till test 2)(Ignore for final))

Question 1

What is a self-referential struct?

Answer 1

Contains a pointer member that points to a structure of the same structure type.

Question 2

Syntax for assigning array/pointer with malloc.

Answer 2

newPtr = malloc(sizeof(what it is pointing to))

Question 3

Library for exit function.

Answer 3

include <stdlib.h></stdlib.h>

Question 4

What are the two symbolic constants for the exit function?

Answer 4

EXIT_SUCCESS
EXIT_FAILURE

Question 5

What is the library for signals?

Answer 5

<signal.h>
</signal.h>

Question 6

What two arguments does the signal function receive? How are singals raised?

Answer 6

A function, and a symbolic constant that will call the function when triggered.

Using the raise function with a symbolic constant as parameter.

Question 7

Labels and goto syntax?

Answer 7

labelname:

goto labelname;

Question 8

How can CTRL Z be simulated with raise function?

Answer 8

raise(SIGINT);

Question 9

What do labels do when the compiler reads them?

Answer 9

Nothing.

Question 10

Bubble sort syntax. (Lecturer’s way)

Answer 10

for(unsigned int pass = 1; pass < SIZE; ++pass){

for(size_t i = 0; i < SIZE - 1; ++i){

if (a[i] > a[i + 1]){
int hold = a[i];
a[i] = a[i + 1];
a[i + 1] = hold;
}

}

}

Question 11

Binary search syntax.

Answer 11

while (low <= high) {
size_t middle = (low + high) \ 2;

if (target == b[middle]){
return middle;
}

else if (target < b[middle]){
high = middle - 1;
}

else {
low = middle + 1;
}
}

Question 12

Library for malloc, realloc and calloc?

Answer 12

include <stdlib.h></stdlib.h>