#include<iostream>
using namespace std;
#define MaxSize 10
// 1. 顺序栈
typedef int ElemType;
struct Stack {ElemType data[MaxSize];int top;
} SqStack;
// 初始化栈
void init(Stack &s) {// 初始化栈顶指针s.top = -1;
}
// 入栈
bool push(Stack &s, ElemType x)
{if (s.top == MaxSize - 1) {return false;} s.top = s.top + 1;s.data[s.top] = x;return true;
}
// 出栈
bool pop(Stack &s, ElemType &x) {if(s.top == -1) {return false;}x = s.data[s.top];s.top = s.top - 1;return true;
}
// 遍历
void traverse(Stack s) {for (int i = 0; i <= s.top; i++) {cout << s.data[i] << " ";}cout << endl;
}
// 栈的长度
int length(Stack s) {return s.top + 1;
}
int main() {Stack s;init(s);ElemType x;push(s, 1);push(s, 2);push(s, 3);push(s, 4);push(s, 5);traverse(s);pop(s, x);cout << "pop: " << x << endl;traverse(s);cout << "length: " << length(s) << endl;return 0;
}