efficient way to check Armstrong_Number in c++

ASSIGNMENTS/calculator.py

@@ -0,0 +1,89 @@
+import tkinter as tk
+import tkinter.messagebox
+from tkinter.constants import SUNKEN
+window = tk.Tk()
+window.title('Calculator-Esan Raj')
+frame = tk.Frame(master = window, bg ="green",padx =10 )
+frame.pack()
+entry = tk.Entry(master = frame,relief= SUNKEN,borderwidth = 2,width =20)
+entry.grid(row =0,column =0 ,columnspan = 3,ipady =2,pady =2)
+
+def myclick(number):
+    entry.insert(tk.END, number)
+
+def equal():
+    try: 
+        y= str(eval(entry.get()))
+        entry.delete(0, tk.END)
+        entry.insert(0,y)
+    except:
+        tkinter.messagebox.showinfo("Error","Invalid Expression")
+
+def clear():
+    entry.delete(0, tk.END)
+
+button_1 = tk.Button(master = frame,text='1',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(1))
+button_1.grid(row =1,column =0,pady= 2)
+
+button_2 = tk.Button(master = frame,text='2',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(2))
+button_2.grid(row =1,column =1,pady= 2)
+
+button_3 = tk.Button(master = frame,text='3',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(3))
+button_3.grid(row =1,column =2,pady= 2)
+
+button_4 = tk.Button(master = frame,text='4',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(4))
+button_4.grid(row =2,column =0,pady= 2)
+
+button_5 = tk.Button(master = frame,text='5',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(5))
+button_5.grid(row =2,column =1,pady= 2)
+
+button_6 = tk.Button(master = frame,text='6',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(6))
+button_6.grid(row =2,column =2,pady= 2)
+
+button_7 = tk.Button(master = frame,text='7',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(7))
+button_7.grid(row =3,column =0,pady= 2)
+
+button_8 = tk.Button(master = frame,text='8',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(8))
+button_8.grid(row =3,column =1,pady= 2)
+
+button_9 = tk.Button(master = frame,text='9',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(9))
+button_9.grid(row =3,column =2,pady= 2)
+
+button_0 = tk.Button(master = frame,text='0',padx =15,
+                    pady = 5,width=3, command=lambda: myclick(0))
+button_0.grid(row =4,column =1,pady= 2)
+
+button_add = tk.Button(master=frame,text='+',padx=15,
+                            pady=5, width = 3,command = lambda: myclick('+'))
+button_add.grid(row = 5,column = 0,pady = 2)
+
+button_subtract = tk.Button(master=frame,text='-',padx=15,
+                            pady=5, width = 3,command = lambda: myclick('-'))
+button_subtract.grid(row = 5,column = 1,pady = 2)
+
+button_multiply = tk.Button(master=frame,text='*',padx=15,
+                            pady=5, width = 3,command = lambda: myclick('*'))
+button_multiply.grid(row = 5,column = 2,pady = 2)
+
+button_div = tk.Button(master=frame,text='/',padx=15,
+                            pady=5, width = 3,command = lambda: myclick('/'))
+button_div.grid(row = 6,column = 0,pady = 2)
+
+button_clear = tk.Button(master=frame,text='clear',padx=15,
+                         pady=5, width = 12,command = clear)
+button_clear.grid(row = 6,column = 1,columnspan = 2,pady = 2)
+
+button_equal = tk.Button(master=frame,text='=',padx=15,
+                         pady=5,width = 9,command = equal)
+button_equal.grid(row = 7,column = 0,columnspan = 3,pady = 2)
+
+window.mainloop()

SOLUTIONS/armstrong_number.cpp

@@ -0,0 +1,23 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+    int n,temp,sum=0,r;
+    cout<<"Enter the number to be checked"<<endl;
+    cin>>n;
+    temp = n;
+    while(n>0)
+    {
+        r = n%10;
+        sum += (r*r*r);
+        n /=10;
+    } 
+    if(sum == temp)
+    {
+        cout<<"Number is armstrong"<<endl;
+    }
+    else{
+        cout<<"Not an Armstrong Number"<<endl;
+    }
+    return 0;
+}