37 lines
455 B
C
37 lines
455 B
C
#include <stdio.h>
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#include <stdlib.h>
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struct pile{
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char val;
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struct pile *suite;
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};
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typedef struct pile pile;
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int empty(pile* p){
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return p==NULL;
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}
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void push(pile **p, char v){
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pile *new=malloc(sizeof(pile));
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new->val=v;
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new->suite=*p;
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*p=new;
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}
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char pop(pile **p){
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char v=(*p)->val;
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pile *temp=*p;
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*p=(*p)->suite;
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free(temp);
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return v;
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}
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void clear(pile **p){
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while(!empty(*p)){
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pop(p);
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}
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}
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char top(pile **p){
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return (*p)->val;
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} |