stack implementation as menu form through c++

Stack_implementation.cpp

@@ -0,0 +1,145 @@
+#include<bits/stdc++.h>
+#include<string>
+using namespace std;
+enum arrsize{siz=25}arrs;
+class Stack
+{
+private:
+    int top,arr[siz];
+    public:
+Stack(int n):top(-1)
+{
+    for(int i=0;i<n;i++)
+    {
+        arr[i]=0;
+    }
+}
+bool isempty()
+{
+    if(top==-1)
+        return true;
+    else
+        return false;
+}
+int display(int n)
+{
+        for(int i=n-1;i>=0;i--)
+            cout<<arr[i]<<" ";
+}
+bool isFull(int n)
+{
+    if(top==n-1)
+    return true;
+    else
+        return false;
+}
+void Push(int n)
+{
+    if(isFull(n))
+    cout<<"stack  overflow\n";
+   else{ int temp;
+    cout <<"enter value for pushing:";
+    cin>>temp;
+    top++;
+    arr[top]=temp;}
+}
+int pop()
+{
+    if(isempty())
+        cout<<"overflow\n";
+    else
+    {int popremove;
+         popremove=arr[top];
+        arr[top]=0;
+        top--;
+        return popremove;
+    }
+
+}
+int peek()
+{
+    if(isempty())
+        {cout<<"overflow";
+    return 0;}
+    else
+    {int pos;
+        cout<<"enter position you want to see";
+        cin>>pos;
+        return arr[pos];
+    }
+}
+int change()
+{
+    if(isempty())
+        cout<<"overflow";
+    else
+    {
+        int pos,value;
+        cout<<"enter position where you want to change value:";cin>>pos;
+        cout<<"\n"<<"enter value:";cin>>value;
+        arr[pos]=value;
+    }
+}
+int countInstack()
+{
+    return (top+1);
+}
+};
+
+int main()
+{
+    int n;
+    int value,choice;
+     arrs=siz;
+     cout<<"enter size of stack:";
+     cin>>n;
+     Stack s1(n);
+   while(1){ cout<<"for performing operation please choose following option\n";
+    cout<<"1.Display\n";
+    cout<<"2.Push\n";
+    cout<<"3.Pop\n";
+    cout<<"4.Peek\n";
+    cout<<"5.is stack empty\n";
+    cout<<"6.change value\n";
+    cout<<"7.count nu. of items\n";
+    cout<<"8.is Stack full\n";
+    cout<<"Press -1 for exit\n";
+    cin>>choice;
+    switch(choice)
+    {
+    case 1:
+        s1.display(n);
+        break;
+    case 2:
+        s1.Push(n);
+        break;
+        case 8:
+             if(s1.isFull(n)==true)
+                cout<<"stack is Full\n";
+            else
+               cout<< "stack is not Full\n";
+            break;
+        case 3:
+            s1.pop();
+            break;
+        case -1:
+            exit(0);
+        case 4:
+           cout<<s1.peek();
+            break;
+        case 5:
+            if(s1.isempty()==true)
+                cout<<"stack is empty\n";
+            else
+               cout<< "stack is not empty\n";
+            break;
+        case 7:
+           cout<<"number of items is:"<<s1.countInstack()<<endl;
+            break;
+            case 6:s1.change();break;
+            default:
+                cout<<"give your input in proper way\n";
+    }
+    }
+    return 0;
+}