수다닷컴

질문 제목 : 스택 질문있는데요스택 구현하는거요질문 내용 :
arraystack.h

#ifndef __ab__stack_h__
#define __ab__stack_h__
#define true 1
#define false 0
#define stack_len 100
typedef int data;
typedef struct _arraystack
{
data stackarr[stack_len];
int topindex;
}arraystack;
typedef arraystack stack;
void stackinit(stack *pstack);
int sisempty(stack * pstack);
void spush(stack * pstack, data data);
data spop(stack * pstack);
data speek(stack * pstack);
#endif

arraystack.c

#include arraystack.h
void stackinit(stack *pstack)
{
pstack-topindex += -1;
}
int sisempty(stack * pstack)
{
if (pstack-topindex == -1)
return true;
else
return false;
}
void spush(stack *pstack, data data)
{
pstack-topindex += 1;
pstack-stackarr[pstack-topindex] = data;
}
data spop(stack * pstack)
{
int ridx;
ridx = pstack-stackarr[pstack-topindex];
pstack-topindex -= 1;
return pstack-stackarr[ridx];
}
data speek(stack * pstack)
{
return pstack-stackarr[pstack-topindex];
}

stackmain.c

#include stdio.h
#include arraystack.h
int main(void)
{
stack stack;
stackinit(&stack);
spush(&stack, 1);

printf(%d, spop(&stack));
return 0;
}

책에랑 비슷하게 구현 해봤는데요
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