C Programming Language

Question 1

Functional Prototypes

Answer 1

Functions need to be defined before “main()” function

Question 2

Function arguments work how?

Answer 2

In C, all function arguments are passed “by value”

Question 3

Meaning of Passed “By Value”?

Answer 3

The called function is given the values of its arguments in temporary variables rather than the originals

Question 4

Passed “By Value” Is different than other languages, how?

Answer 4

“Call by reference” - that allows the called routine to get the originals, not the copies

Question 5

Called by value - is?

Answer 5

An asset, not a liability

Question 6

C - Function Variables

Answer 6

(passed by) Value - copy ( not originals - a temporary copy )

Question 7

It is possible for (C) - to reference a variable directly, How?

Answer 7

The caller must provide the address of the variable to be set. Technically a pointer to said variable

Question 8

in C - Arrays - are different, How?

Answer 8

They are always referenced by originals

Question 9

Local Variables, are?

Answer 9

Automatic Variables

Question 10

Local Vs. External - variables?

Answer 10

Alternative to ‘local’ variable - is ‘external’ variable

Question 11

Condition of External Variables

Answer 11

If the definition of an external variable occurs in the source file before its use in a particular function, then there is no need for an ‘extern’ declaration in the function

Question 12

“Definition”

Answer 12

Refers to the place where the variable is created or assigned storage

Question 13

“Declaration”

Answer 13

Refers to the place where the nature of the variable is stated but no storage is allocated

Question 14

variable habit?

Answer 14

There is a tendency to use variables for everything!

Question 15

variable - caution:

Answer 15

But extern variables are there - even when you don’t want them

Question 16

Variable in C - To get direct access?:

Answer 16

point - directly to the variable

Question 17

Enumerations

Answer 17

• Takes variables already declared within enum declaration and allows you to choose one variable in enum list
• Or map your way through all variables declared when enum was defined
• If undefined - the list follows index++