C语言数据结构-栈stack

栈stack - 是限定在表尾进行插入或删除的线性表

#ifndef __STACK_H__
#define __STACK_H__


#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLF -1
#define OVERFLOW -2

#define STACK_INIT_SIZE 100
#define STACKINCREMENT 10

typedef int Status;

typedef int SElemType;

typedef struct {
	SElemType *base;
	SElemType *top;
	int stacksize;
	int length;
}SqStack;

#endif

　　

#include"stack.h"
#include<stdlib.h>
#include<stdio.h>

Status InitStack(SqStack &S) {
	S.base = (SElemType *)malloc(STACK_INIT_SIZE * sizeof(SElemType));
	if(!S.base) {
		exit(OVERFLOW);
	}

	S.top = S.base;
	S.stacksize = STACK_INIT_SIZE;
	S.length = 0;
	return OK;
}

Status GetTop(SqStack S, SElemType &e) {
	if(S.top == S.base) {
		return ERROR;
	}

	e = *(S.top - 1);
	return OK;
}

Status Push(SqStack &S, SElemType e) {
	if(S.top - S.base >= S.stacksize) {
		S.base = (SElemType *)realloc(S.base,
			(S.stacksize + STACKINCREMENT) * sizeof(SElemType));
		if(!S.base) {
			exit(OVERFLOW);
		}
		S.top = S.base + S.stacksize;
		S.stacksize += STACKINCREMENT;
	}
	*S.top++ = e;
	S.length++;
	return OK;
}


void show(SqStack &S) {
	printf("stacksize = %d
", S.stacksize);
	printf("length = %d
", S.length);
	if(S.length == 0) {
		return;
	}

	for(int i = 0; i < S.length; i++) {
		printf("index = %d, value = %d
", i, S.base[i]);
	}
}

Status Pop(SqStack &S, SElemType &e) {
	if(S.top == S.base) {
		return ERROR;
	}
	e = *--S.top;
	S.length--;
	return OK;
}

Status StackEmpty(SqStack &S) {
	return S.length == 0;
}

void conversionTo8(int tenNumber){
	SqStack S;
	InitStack(S);
	int n;
	printf("%d to eight number ", tenNumber);

	while(tenNumber) {
		Push(S, tenNumber % 8);
		tenNumber = tenNumber / 8;
	}
	
	while(!StackEmpty(S)){
		Pop(S, n);
		printf("%d", n);
	}
	printf("
");
}

int main() {

	SElemType e;
	SqStack S;
	InitStack(S);
	Push(S, 1);
	Push(S, 2);

	show(S);

	Pop(S, e);
	show(S);

	int i = StackEmpty(S);
	printf("i = %d
", i);

	conversionTo8(1348);
	return OK;
}