#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#define length 10
typedef int DataType;
typedef struct Stack
{
DataType* top;
DataType* base; //栈顶指针
int stackSize;
}Stack;
// 栈的实现接口
//初始化栈
void StackInit(Stack* s){
s->base=(DataType *)malloc(length*sizeof(DataType));
if(!s->base)
{
exit(0);
}
s->top=s->base;
s->stackSize=length;
}
//压栈 向栈中添加元素
void Push(Stack* s, DataType x){
if(s->top - s->base >= s->stackSize)
{
s->base=(DataType *)realloc(s->base,(s->stackSize+length)*sizeof(DataType));
if(!s->base)
{
exit(0);
}
s->top=s->base+s->stackSize;
s->stackSize+=length;
}
*s->top=x;
s->top++;
}
// 出栈，只单纯的删除一个元素
void Pop(Stack* s){
if(s->base==s->top)
{
exit(0);
}
s->top--;
}
//出栈 向栈中删除元素,并返回e值
// DataType Pop(Stack* s){
// if(s->base== s->top)
// {
// exit(0);
// }
// e= *s->top;
// s->top--;
// return e;
// }
//查看栈顶
DataType StackTop(Stack* s){
if(s->base==s->top)
{
printf("栈为空");
exit(0);
}
return *(s->top-1);
}
//栈的大小
size_t StackSize(Stack* s){
return s->top-s->base;
}
void Myprint(Stack s)
{
while (s.top!=s.base-1)
{
s.top--;
printf("%d ",*(s.top));
}
}
int main()
{
Stack s;
int x;
int i;
StackInit(&s);
Push(&s, 6);
Push(&s, 5);
Push(&s, 4);
printf("~~~%d
",Pop(&s));
Push(&s,3);
Push(&s,2);
Push(&s,1);
x = StackSize(&s);
i = s.stackSize;
printf("
%d , %d
",i,x);
Myprint(s);
system("pause");
return 0;
}