Merge pull request #398 from payallenka/main

Enhancement of the calculator project #333 - Completed

Author: Mrinank-Bhowmick

projects/Calculator/main.py

@@ -25,6 +25,10 @@ def multiplication():
 def division():
     n1 = float(input("Enter first number: "))
     n2 = float(input("Enter second number: "))
+    if n2==0:
+        print("Invalid entry")
+        return "Invalid entry"
+    print(n1/n2)
 
     return n1 / n2
 
@@ -34,13 +38,70 @@ def average():
     return sum(nums) / len(nums)
 
 
+def factorial(num):
+
+    answer =1
+    for i in range(num):
+        answer*=i+1
+    return answer
+
+def complexarithmetic():
+    print("Enter '1' for complex addition")
+    print("Enter '2' for complex substraction")
+    print("Enter '3' for complex multiplication")
+    print("Enter '4' for complex division")
+    choice = (input("enter your choice"))
+    if choice =="1":
+        nums = list(map(int, input("Enter all numbers seperated by space: ").split()))
+        real_sum=0
+        imag_sum=0
+        for i in range(0,len(nums)-1,2):
+            real_sum +=nums[i]
+        for i in range(2,len(nums)-1,2):
+            imag_sum+=nums[i]
+        imag_sum+=nums[-1]
+        return f"{real_sum}+ i{imag_sum}"
+
+    elif choice =="2":
+        nums = list(map(int, input("Enter all numbers seperated by space: ").split()))
+        real_sub=nums[0]
+        imag_sub=nums[1]
+        for i in range(2,len(nums)-1,2):
+            real_sub -=nums[i]
+        for i in range(3,len(nums)-1,2):
+            imag_sub-=nums[i]
+        imag_sub-=nums[-1]
+        return f"{real_sub}+ i{imag_sub}"
+
+    elif choice =="3":
+        nums = list(map(int, input("Enter all numbers seperated by space maximum 4 elements: ").split()))
+        real = (nums[0]*nums[2]-nums[1]*nums[3])
+        imag = (nums[0]*nums[3]+ nums[2]*nums[1])
+        return f"{real}+ i{imag}"
+
+    elif choice =="4":
+        nums = list(map(int, input("Enter all numbers seperated by space maximum 4 elements: ").split()))
+        real = ((nums[0]*nums[2]+nums[1]*nums[3])/(nums[2]**2+nums[3]**2))
+        imag = ((nums[1]*nums[2] - nums[0]*nums[3])/(nums[2]**2+nums[3]**2))
+        return f"{real}+ i{imag}"
+
+def binomail(num):
+    result = factorial(num[0])/(factorial(num[1])*factorial(num[0]-num[1]))
+    return result
+
+
+
+
 c = 0
 while c != "-1":
     print("Enter '1' for addition")
     print("Enter '2' for subtraction")
     print("Enter '3' for multiplication")
     print("Enter '4' for division")
     print("Enter '5' for average")
+    print("Enter '6' for factorial")
+    print("Enter '7' for complex arithmetic")
+    print("ENter '8'  for binomial")
     print("Enter '-1' to exit.\n")
 
     c = input("Your choice is: ")
@@ -69,6 +130,8 @@ def average():
     elif c == "4":
         res = division()
         os.system("cls")
+        if res =="Invalid entry":
+            continue
         print(f"The answer is {res}")
         time.sleep(2)
         os.system("cls")
@@ -80,12 +143,43 @@ def average():
         time.sleep(2)
         os.system("cls")
 
+    elif c == "6":
+        num = int(input("enter the number: "))
+        if num<0:
+            print("Invalid entry")
+            continue
+        res = factorial(num)
+        os.system("cls")
+        print(f"The answer is {res}")
+        time.sleep(2)
+        os.system("cls")
+
+    elif c=="7":
+        os.system("cls")
+        print(complexarithmetic())
+        time.sleep(2)
+        os.system("cls")
+
+    elif c=="8":
+        os.system("cls")
+        num = list(map(int,input("Enter the number seperated by space").split()))
+        if num[0]<num[1]:
+            print("Invalid entry")
+            continue
+        res = binomail(num)
+        os.system("cls")
+        print(f"The answer is {res}")
+        time.sleep(2)
+        os.system("cls")
+
+
     elif c == "-1":
         os.system("cls")
         print("Thank you for using the calculator!")
         time.sleep(2)
         break
 
+
     else:
         os.system("cls")
         print("Sorry, invalid option!")