How can structures be declared and used in c program?

Answer 1

You declare a structure as follows:

struct name {

typename_1 member_name_1; typename_2 member_name_2;

// additional members...

};

Answer 2

Initally, a structure must be defined with any and all variables (and/or functions) which should be included. The primary use for a structure is to contain instances of variable types - for example an integer - which will contain different information. A structure can contain any variable type (int, string, bool e.t.c)

To declare a structure, it should look like this:

struct NameOfStructure

{

variable_type name_of_variable1;

variable_type name_of_variable2;

};

Once the structure is declared (similar to above), it needs to be called, and an instance of the structure needs to be created.

Note: If the structure has been created in an external header file, the header.hpp needs to be include. This can be done like so:

#include name_of_header.hpp

Within the program, and to call a structure, it should look something like this:

NameOfStructure structure;

The structure name becomes a variable type, and you use it as such. The name 'structure' therefore will become a useable instance which contains all data members which were implemented when the structure was created.

For example, if the structure contained:

int number;

int box;

to access these members (using the aforementioned structure), it should look like this:

structure.number;

This directly accesses the data which is held within the member 'number,' and can be manipulated as such.

Answer 3

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