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Tipuri de date abstracte. Stive. Cozi

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<strong>Tipuri</strong> <strong>de</strong> <strong>date</strong> <strong>abstracte</strong>. <strong>Stive</strong>. <strong>Cozi</strong> 7<br />

Încapsularea<br />

== faptul cǎ <strong>de</strong>taliile <strong>de</strong> implementare sunt ascunse <strong>de</strong> utilizator<br />

Pentru folosirea stivei, ar fi suficient un fi¸sier cu<br />

type<strong>de</strong>f int elem_t; /* trebuie specificat tipul elementului */<br />

type<strong>de</strong>f struct s stack; /* tip incomplet */<br />

void init(stack *s);<br />

int empty(stack *s);<br />

void push(stack *s, elem_t e);<br />

elem_t pop(stack *s);<br />

int full(stack *s);<br />

Implementarea: într-un fi¸sier compilat separat, invizibil utilizatorului<br />

– trebuie recompilat însǎ dacǎ schimbǎm <strong>de</strong>finit¸ia elementului<br />

– o solut¸ie: stivǎ <strong>de</strong> pointeri void *, nu obiecte propriu-zise<br />

Utilizarea ¸si programarea calculatoarelor. Curs 12 Marius Minea

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