C++ 棧 （數組實現）

上一篇用鏈表實現了stack，這篇我們採用數組來存儲數據，數組更容易理解，直接貼代碼

第一、代碼實現

 1 #pragma once
 2 #include <iostream>
 3 using namespace std;
 4 template <typename T> class StackArray {
 5 public:
 6     StackArray(int size) {
 7         this->top = -1;
 8         this->maxSize = size;
 9         elements = new T[size];
10     }
11     ~StackArray() {
12         delete [] elements;
13     }
14     bool push(T t);
15     T pop();
16     bool isEmpty();
17     void print();
18 
19 private:
20     int top = -1;
21     int maxSize;
22     T* elements;
23 
24 };
25 
26 template<typename T>
27 bool StackArray<T>::push(T data) {
28     if (top==maxSize)
29     {
30         return false;
31     }
32     elements[++top] = data;
33     return true;
34 }
35 
36 template<typename T>
37 T StackArray<T>::pop() {
38     if (top==-1)
39     {
40         exit(-1);
41     }
42     return elements[top--];
43 }
44 
45 template<typename T>
46 bool StackArray<T>::isEmpty() {
47     return top == -1;
48 }
49 
50 template<typename T>
51 void StackArray<T>::print() {
52     int loop = top;
53     while (loop>=0)
54     {
55         cout << elements[loop] << endl;
56         loop--;
57     }
58 }

第二、測試運行

 1 #include "pch.h"
 2 #include "StackArray.h"
 3 #include <iostream>
 4 using namespace std;
 5 
 6 int main()
 7 {
 8     StackArray<int> stack(10);
 9     stack.push(1);
10     stack.push(3);
11     stack.push(10);
12     stack.push(40);
13     stack.pop();
14     stack.push(30);
15 
16     stack.print();
17 
18     std::cout << "Hello World!\n"; 
19 }