[C] ArrayBaseStack

// HEADER

#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

// SOURCE

#include <stdio.h>
#include <stdlib.h>
#include "ArrayBaseStack.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;

	if(SIsEmpty(pstack))
	{
		printf("Stack Memory Error!");
		exit(-1);
	}

	rIdx = pstack->topIndex;
	pstack->topIndex -= 1;

	return pstack->stackArr[rIdx];
}

Data SPeek(Stack * pstack)
{
	if(SIsEmpty(pstack))
	{
		printf("Stack Memory Error!");
		exit(-1);
	}

	return pstack->stackArr[pstack->topIndex];
}

// MAIN

#include <stdio.h>
#include "ArrayBaseStack.h"

int main(void)
{
	// Stack의 생성 및 초기화 ///////
	Stack stack;
	StackInit(&stack);

	// 데이터 넣기 ///////
	SPush(&stack, 1);  SPush(&stack, 2);
	SPush(&stack, 3);  SPush(&stack, 4);
	SPush(&stack, 5);

	// 데이터 꺼내기 ///////
	while(!SIsEmpty(&stack))
		printf("%d ", SPop(&stack)); 

	return 0;
}