Merge pull request #12 from PaprikaX33/statement-based

Statement based

calc_main.py

@@ -1,4 +1,35 @@
+#!/usr/bin/env python2
 import math
+import parser as pr
+
+def add(a, b):
+    return a + b
+def red(a, b):
+    return a - b
+def mul(a, b):
+    return a * b
+def div(a, b):
+    return a / b
+def power(a, b):
+    return a ** b
+
+def statement_wrapper():
+    doper = {
+         '+' : add
+        ,'-' : red
+        ,'*' : mul
+        ,'/' : div
+        ,'^' : power
+    }
+    states=raw_input(">>")
+    result=pr.apply(states, darg=doper)
+    if(result == None):
+        print("<< Undefined")
+    else:
+        full = "<< ", str(result)
+        print(full)
+    return
+
 while True:
     print("MENU")
     print("1 for addition :")
@@ -8,41 +39,41 @@
     print("5 for Division:")
     print("6 for floor division:")
     print("7 for factorial:")
+    print("8 for Statement based:")
     choice=int(input("enter any choice:"))
     def additon():
         a=int(input("enter 1st no to perform addition:"))         #a-first input
         b=int(input("enter 2nd no to perform addition:"))          #b-second input
-        c=a+b
+        c=add(a, b)
         print("sum is:",c)
         return
     def subtract():
         a = int(input("enter 1st no to perform subtraction:"))
         b = int(input("enter 2nd no to perform subtraction:"))
-        c = a - b
+        c = red(a, b)
         print("subtraction is:", c)
         return
     def multiplication():
         a = int(input("enter 1st no to perform multipication:"))
         b = int(input("enter 2nd no to perform multiplication:"))
-        c = a*b
+        c = mul(a, b)
         print("multiplication is:", c)
         return
     def power():
         a = int(input("enter base :"))
         b = int(input("enter power :"))
-        c = a**b
+        c = pow(a, b)
         print("division is:", c)
         return
 
     def divide():
         a = int(input("enter 1st no to perform division:"))
         b = int(input("enter 2nd no to perform division:"))
-        c = a/b
+        c = div(a, b)
         print("division is:", c)
         return
-    def floor_division():
-
-
+    #def floor_division():
+
     def factorial():
         num = int(input("enter a number: "))
         if num < 0:
@@ -69,6 +100,9 @@ def factorial():
         floor_division()
     elif choice==7:
         factorial()
+    elif choice==8:
+        statement_wrapper()
     else:
         print("wrong input")
         exit(0)
+