Merge pull request #1 from Py-Contributors/master

Merge request

Author: VyomGarg47

.github/PULL_REQUEST_TEMPLATE.md

@@ -21,4 +21,4 @@ time complexity -
 """
 ```
 
-Become a maintainer on this repo - https://discord.gg/D4YmRxY
+### README - [How to Contribute](https://github.com/Py-Contributors/AlgorithmsAndDataStructure/blob/master/CONTRIBUTING.md)

C++/Data Structure/Stacks/stackds.cpp

@@ -0,0 +1,88 @@
+//C++ Program to implement Stack Data Structure
+#include <bits/stdc++.h>
+//Setting a Max SIZE for Stack
+#define SIZE 100
+
+using namespace std;
+
+class Stack
+{
+    int item[SIZE];
+    int top;
+
+public:
+    Stack() //default constructor
+    {
+        top = -1;
+    }
+
+    bool isEmpty() //check if stack is Empty
+    {
+        if (top == -1)
+        {
+            cout << "Stack is Empty\n";
+            return true;
+        }
+        return false;
+    }
+
+    bool isFull()   //check if stack in Full   
+    {
+        if (top == SIZE - 1)
+        {
+            cout << "Stack is full\n";
+            return true;
+        }
+        return false;
+    }
+
+    void push(int val)  //push elements into the stack
+    {
+        if (isFull())
+        {
+            exit(0);
+        }
+        top++;
+        item[top] = val;
+    }
+
+    int pop()   //pop elements from the stack
+    {
+        int val;
+        if (isEmpty())
+        {
+            exit(0);
+        }
+        val = item[top];
+        top--;
+        return val;
+    }
+
+    int peek()  //return element at the top of stack
+    {
+        int val;
+        if (isEmpty())
+        {
+            exit(0);
+        }
+        val = item[top];
+        return val;
+    }
+};
+
+int main()
+{
+    Stack s;
+    s.push(10);
+    s.push(30);
+    s.push(20);
+    s.push(5);
+    s.push(1);
+    cout << s.pop() << endl;
+    cout << s.pop() << endl;
+    cout << s.peek() << endl;
+    cout << s.pop() << endl;
+    cout << s.pop() << endl;
+    cout << s.pop() << endl;
+    return 0;
+}

README.md

@@ -46,7 +46,7 @@ Check [Contribution](/CONTRIBUTING.md) Guide Before Contribution.
 |----------------	|----------------	|-----------------	|--------------------	|
 | Linked List    	| Yes            	| Yes             	| Being improved #23 	|
 | Sets           	| Yes            	| Yes             	| Implemented        	|
-| Stack          	| No             	| In progress #13 	|                    	|
+| Stack          	| Yes            	| In progress #13 	|                    	|
 | Queue          	| In progress #7 	| In progress #12 	|                    	|