Merge branch 'feature_main_menu' into 'main'

implement fitur main menu

See merge request !11

main.py

+import addition
+import substraction
+import multiplication
+import division
+import power
+
+def printActions():
+    print("1. Addition")
+    print("2. Substraction")
+    print("3. Multiplication")
+    print("4. Division")
+    print("5. Power")
+    print("6. Exit")
+    print()
+
+def isInputNumber(userInput):
+    try:
+        val = float(userInput)
+        return True
+    except ValueError:
+        return False
+
+def getAction():
+    choice = input("Choose action: ")
+    while (choice not in ["1", "2", "3", "4", "5", "6"]):
+        print("Error: invalid action")
+        choice = input("Choose action: ")
+
+    return choice
+
+def getXY():
+    print()
+    input_x = input("X: ")
+    input_y = input("Y: ")
+
+    while (not (isInputNumber(input_x) and isInputNumber(input_y))):
+        print("Error: invalid number")
+        input_x = input("X: ")
+        input_y = input("Y: ")
+    
+    x = float(input_x)
+    y = float(input_y)
+
+    return x, y
+
+def calculate(action, x, y):
+    if (action == "1"):
+        return addition.add(x, y)
+    elif (action == "2"):
+        return substraction.Substraction(x, y)
+    elif (action == "3"):
+        return multiplication.multiplication(x, y)
+    elif (action == "4"):
+        return division.divide(x, y)
+    elif (action == "5"):
+        return power.power(x, y)
+    else:
+        return "Error: invalid action"
+
+def run():
+    while (True):
+        printActions()
+        action = getAction()
+        if (action == "6"):
+            break
+        else:
+            x, y = getXY()
+            result = calculate(action, x, y)
+            print(f'\nResult: {result}\n')
+
+run()
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