Forward Declarations And Compiling Multiple Files

Question 1

Forward declaration

Answer 1

Tells the compiler about existence of identifier before defining an identifier

Question 2

Function prototype

Answer 2

Declaration statement used to write a forward declaration, consists of function, return type, name, parameters, no body and (;)

Question 3

Definition

Answer 3

Implements/instentiates the identifier

Question 4

ODR

Answer 4

One definition rule

• within a file, function, objec or template
• within a program, an object or normal function
• types, templates and inline functions can have identical deffinitions in different files

Question 5

Declaration

Answer 5

We use it when we want to use identifier before it is defined

Question 6

Definitions

Answer 6

Are declarations in c++

Question 7

Compiling files

Answer 7

Each file individualy, its limited visability and short memory is to have functions or variables that have same name without conflicting

Question 8

To add new file

Answer 8

Right click source files in solution explorer and choose add, new file

Question 9

Errors when working with multiple files

Answer 9

• forgeting to forward declaration to functions
• add.cpp is not added correctly
• add.cpp is added to wrong project
• file is set to not compile or link
• do not #include add.cpp from main.cpp

Question 10

Naming collision

Answer 10

Error when 2 identical identifiers are introduced into the same program in a way where the compiler/linker can’t tell them apart

Question 11

Occurence of naming collisions

Answer 11

• when 2 or more deffinitions for functions are introduced into a seperate files that are compiled into the same program
• when 2 or more definitions for functions are introduced into the same file

Question 12

Namespace

Answer 12

Region that allows you to declare names inside of it for the purpose of disambiguation, provides own namespace scope and must have unique names.

Question 13

Global namespace

Answer 13

Any name that is not defined inside a class, function or namespace

Question 14

:: (symbol)

Answer 14

Scope resolution operator, identifier to the left identifies the namespace where the name to the right is contained with