#include<iostream>using namespace std;struct Stack{    int maxCnt;    int* elements;    int top,bottom;};Stack* createStack(int max=100){     Stack* stack = (Stack*)malloc(sizeof(Stack));     stack->top=0;     stack->bottom=0;     stack->maxCnt=max;     stack->elements = new int[ stack->maxCnt];     return  stack;}bool push(Stack* stack,int value){    if(stack->top>=stack->maxCnt)        return 0;    stack->elements[stack->top++]=value;    return 1;}bool isEmpty(Stack* stack){    return stack->top<=0;}bool pop(Stack* stack,int* ans){    if(isEmpty(stack))      return 0;    *ans = stack->elements[--stack->top];    return 1;}bool top(Stack* stack,int* ans){    if(isEmpty(stack))      return 0;    *ans = stack->elements[stack->top-1];    return 1;}void clearStack(Stack* stack){    int x;    while(!isEmpty(stack))    {        pop(stack,&x);    }}void outPut(Stack* stack){    int x;    while(!isEmpty(stack))    {        pop(stack,&x);        cout<<x<<" ";    }    cout<<endl;}void main(){    int len=12;    Stack* st = createStack();    int v;    for(int i=0;i<len;i++)    {         v = rand() % 100;         cout<<v<<" ";         push(st,v);    }    cout<<endl;    outPut(st);    clearStack(st);    for(int i=0;i<5;i++)    {         v = rand() % 100;         cout<<v<<" ";         push(st,v);    }    cout<<endl;    outPut(st);        for(int i=0;i<5;i++)    {         v = rand() % 100;         cout<<v<<" ";         push(st,v);    }    cout<<endl;    //outPut(st);    pop(st,&v);    cout<<v<<endl;    ///outPut(st);    top(st,&v);    cout<<v<<endl;    outPut(st);    cin>>len;}