栈的顺序表示和实现（C语言）

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

const int MAXSIZE = 100;
#define OK 1;
#define ERROR 0;
#define OVERFLOW 0;
#define TURE 1;
#define FALSE 0;


typedef int Status;
typedef char SElemType;  //栈型数据 
//顺序栈定义 
typedef struct {
    SElemType *base;  //栈顶指针
    SElemType *top;  //栈底指针
    int stacksize;  //顺序栈可用最大容量 
} SqStack;  //顺序栈 


//顺序栈初始化
Status InitStack(SqStack *stack){
    stack->base=(SElemType*)malloc(sizeof(SElemType)*MAXSIZE);  //分配空间 
    if(!stack->base) return OVERFLOW;  //分配失败 
    stack->top=stack->base;  //初始时让栈顶指针等于栈底指针 
    stack->stacksize=MAXSIZE;  //栈最大容量 
    return OK;
}

//判断顺序栈是否为空
Status StackIsEmpty(SqStack stack) {
    if(stack.top==stack.base){ //栈为空的条件：栈顶==栈底 
        return TURE;
    } else {
        return FALSE;
    }
} 

//求顺序栈长度 
int StackLength(SqStack stack) {
    if(!stack.base){
        return 0;
    }
    return stack.top-stack.base;
}

//顺序栈清空
Status ClearStack(SqStack *stack) {
    if(!stack->base){  //栈不存在 
        return ERROR;
    } else {
        stack->top=stack->base;
        return OK;
    }                                                                                   
}

//顺序栈销毁 
Status DestroyStack(SqStack *stack) {
    if(!stack->base){  //栈不存在 
        return ERROR;
    } else {
        free(stack->base);
        stack->stacksize=0;
        //stack->base=stack->top=NULL; 
        stack->base=NULL;
        stack->top=NULL;
        return OK;
    }
}

//元素进入顺序栈 
Status Push(SqStack *stack,SElemType elem) {
    if(stack->top-stack->base==stack->stacksize){
        return ERROR;  //栈满 
    } else {
        *(stack->top)=elem;
        (stack->top)++;
        return OK;
    } 
}

//顺序栈的出栈操作
Status Pop(SqStack *stack,SElemType *elem){
    if(stack->top==stack->base) {
        return ERROR;  //下溢
    } else {
        (stack->top)--;
        *elem = *(stack->top);  //取出栈顶元素放入elem
        return OK;
    }
}


int main(void){
    SqStack stack1;
    
    //初始化 
    Status initStackResult = InitStack(&stack1);
    printf("栈stack1初始化结果码：%d\n",initStackResult);
    
    //是否为空
    Status stackIsEmpty = StackIsEmpty(stack1);
    printf("栈stack1为空？：%d\n",stackIsEmpty);
    
    //清空栈
    Status clearStackResult = ClearStack(&stack1);
    printf("栈清空结果：%d\n",clearStackResult);
    
    //销毁栈
    /*
    Status destroyStackResult = DestroyStack(&stack1);
    printf("栈销毁结果：%d\n",destroyStackResult);
    */
    
    //元素入栈
    SElemType elem1=‘Y‘,elem2=‘C‘;
    Status pushResult = Push(&stack1,elem1);
    printf("入栈执行结果：%d\n",pushResult);
    Push(&stack1,elem2); //将elem2也入栈
    printf("栈顶元素值：%c\n",*(stack1.top-1));
    
    //元素出栈
    SElemType elem3;  //下面取出的数据放入elem3
    Status popResult = Pop(&stack1,&elem3);
    printf("出栈执行结果：%d\n",popResult);
    printf("出栈元素值：%c\n",elem3);
    printf("栈顶元素值：%c\n",*(stack1.top-1));
    
    printf("\nEND");
    return 0;
}