Initialization (programming): Difference between revisions

Revision as of 09:20, 22 November 2012

Revision as of 15:00, 22 November 2012

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==C family of languages==

===Initializer===

In C/C99/C++, an '''initializer''' is an optional part of a [[declarator (computing)|declarator]]. It consists of the '=' character followed by an [[expression (programming)|expression]] or a comma-separated list of expressions placed in curly brackets (braces). The latter list is sometimes called the "initializer list" or "initialization list", although the term "initializer list" is formally reserved for initialization of class/struct members in C++, see below.

A declaration which includes initialization is commonly called '''definition'''.

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char tx[3]="fa";

char ty[2]="fa";

struct point {int x; int y;} p = {7, 13};

</source>

C only example, using designated initializers:<ref name="bk21st">{{cite book | last = Klemens | first = Ben | authorlink = Ben Klemens | title = 21st Century C | publisher = [[O'Reilly Media]] | date = 2013 | isbn = 1449327141 }}</ref>

<source lang="c">

struct point {int x; int y;} p = { .y = 13 , .x = 7 };

</source>