### Lab7-1 ###

a = int(input("Enter an interger: "))

if a < 1:
    a += 1
    b = a + 3

print(b)



### Lab7-2 (ex7-1) ###

num = int(input("Enter a number: "))

if num > 0:
    print("num is positive")

print("finished comparing num to 0")



### Lab7-3 (觀念驗證 7.2) ###

num = int(input("Enter a number: "))

if num < 10:
    print("num is less than 10")

print("Finished")



### Lab7-4 (觀念驗證 7.3) ###

# 第 1 題
word = input("Tell me a word: ")
print(word)

if " " in word:
    print("You did not follow directions.")



# 第 2 題
num1 = int(input("One number: "))
num2 = int(input("Another number: "))
print(num1 + num2)

if num1 + num2 > 10000:
    print("Wow, huge sum!")



### Lab7-5 (ex7-2) ###

num_a = int(input("Pick a number: "))

if num_a > 0:
    print("Your number is positive")

if num_a < 0:
    print("Your number is negative")

if num_a == 0: 
    print("Your number is zero")

print("Finished!")



### Lab7-6 (ex7-3) ###

# 巢狀條件式
num_a = int(input("Number? "))
num_b = int(input("Number? "))

if num_a < 0:      
    print("num_a is negative")
    if num_b < 0:
        print("num_b is negative")

print("Finished")



# 非巢狀條件式
num_a = int(input("Number? "))
num_b = int(input("Number? "))

if num_a < 0:      
    print("num_a is negative")

if num_b < 0:
    print("num_b is negative")

print("Finished")



### Lab7-7 (ex7-4) ###

price = float(input("How much does a chocolate bar cost? "))
hungry = input("Are you hungry (yes or no)? ")
bars = 0

if hungry == "yes": 
    if price < 10:
        print("Buy all chocolate bars.")
        bars = 100
    if 10 <= price <= 50:
        print("Buy 10 chocolate bars.")     
        bars = 10
    if price > 50:
        print("Buy only one chocolate bar.")
        bars = 1

if hungry == "no":
    print("Stick to the shopping list.")

if bars > 10:
    print("Cashier says: someone's hungry!")



### Lab7-8 (ex7-5) ###

# 多條件運算式
num_a = int(input("Number? "))
num_b = int(input("Number? "))

if num_a < 0 and num_b < 0: 
    print("both negative")



# 巢狀條件式
num_a = int(input("Number? "))
num_b = int(input("Number? "))

if num_a < 0:
    if num_b < 0:
        print("both negative")



### Lab7-9 (ex7-6) ###

Num = int(input("please pick a number: "))

if Num % 2 == 0:
    print("Even Number")
else:
    print("Odd Number")



### Lab7-10 (觀念驗證 7.5) ###

Num = int(input("please pick a number: "))

if Num > 0:
    print("Positive Number")
else:
    print("Negative Number")



### Lab7-11 (ex7-7) ###

num = int(input("Enter a number: "))

if num > 0:
    print("num is positive")
elif num < 0:
    print("num is negative")
else:
    print("num is zero")



### Lab7-12 (觀念驗證 7.5) ###

# if-elif-else 敘述
num = int(input("Enter a number: "))
if num < 6:
    print("num is less than 6")
elif num < 10:
    print("num is less than 10")
elif num > 3:
    print("num is greater than 3")
else:
    print("No relation found.")
print("Finished.")



# if 敘述
num = int(input("Enter a number: "))
if num < 6:
    print("num is less than 6")
if num < 10:
    print("num is less than 10")
if num > 3:
    print("num is greater than 3")
print("Finished.")



### Lab7-13 (ex7-8) ###

num_a = int(input("pick a number: "))
num_b = int(input("pick another number: "))
lucky_num = 7

if num_a == num_b:
    print("You enter the same number")
else:
    if num_a > 0 and num_b > 0:
        print("both numbers are positive")
    elif num_a < 0 and num_b < 0:
        print("both numbers are negative")
    else:
        print("numbers have opposite sign")

if num_a == lucky_num or num_b == lucky_num:
    print("you also guessed my lucky number!")
else:
    print("I have a secret number in mind...")



### Lab7-14 (ex7-9) ###

num_a = int(input("pick a number: "))
num_b = int(input("pick another number: "))
lucky_num = 7

if num_a == num_b:
    print("You enter the same number")
elif num_a > 0 and num_b > 0:
    print("both numbers are positive")
elif num_a < 0 and num_b < 0:
    print("both numbers are negative")
else:
    print("numbers have opposite sign")

if num_a == lucky_num or num_b == lucky_num:
    print("you also guessed my lucky number!")
else:
    print("I have a secret number in mind...")



### Lab7-15 (ex7-10) ###

greeting = input("Say hi in English or Spanish! ")
greet_en = ("hi", "Hi", "hello", "Hello")
greet_sp = ("hola", "Hola")

if greeting not in greet_en and greeting not in greet_sp:
    print("I don't understand your greeting.")
elif greeting in greet_en:
    num = int(input("Enter 1 or 2: "))
    print("You speak English!")

    if num == 1:
        print("one")
    elif num == 2:
        print("two")

elif greeting in greet_sp:
    num = int(input("Enter 1 or 2: "))
    print("You speak Spanish!")

    if num == 1:
        print("uno")
    elif num == 2:
        print("dos")



### Lab7-16 (ex7-11) ###

print("You are on a deserted island in a 2D world.")
print("Try to survive until rescue arrives!")
print("Available commands are in CAPITAL letters.") 
print("Any other command exits the program") 
print("First LOOK around...")



### Lab7-17 (ex7-12) ###

do = input(":: ")

if do == "LOOK":
    print("You are stuck in a sand ditch.")
    print("Crawl out LEFT or RIGHT.")
    do = input(":: ")
    if do == "LEFT":
        print("You make it out and see a ship!")
        print("You survived!")
    elif do == "RIGHT": 
        print("No can do. That side is very slippery.")
        print("You fall very far into some weird cavern.")
        print("You do not survive :(")
else:
    print("You can only do actions shown in capital letters.")
    print("Try again!")



### Lab7-18 (ex7-13) ###

print("You are on a deserted island in a 2D world.")
print("Try to survive until rescue arrives!")
print("Available commands are in CAPITAL letters.") 
print("Any other command exits the program") 
print("First LOOK around...")

do = input(":: ")

if do == "LOOK":
    print("You are stuck in a sand ditch.")
    print("Crawl out LEFT or RIGHT.")

    do = input(":: ")

    if do == "LEFT":
        print("You see a STARFISH and a CRAB on the sand.")
        print("And you're hungry! Which do you eat?")

        do = input(":: ")

        if do == "STARFISH": 
            print("Oh no! You immediately don't feel well.")
            print("You do not survive :(")
        elif do == "CRAB":
            print("Raw crab should be fine, right? YES or NO.")
            
            do = input(":: ")

            if do == "YES": 
                print("Ok, You eat it raw. Fingers crossed.")
                print("Food in your belly helps you see a TREE.")

                do = input(":: ")

                if do == "TREE": 
                    print("It's a coconut tree! And you're thirsty!")
                    print("Do you drink the coconut water? YES or NO.")

                    do = input(":: ")

                    if do == "YES": 
                        print("Oh boy. Coconut water and rawcrab don't mix.")
                        print("You do not survive :(")
                    elif do == "NO": 
                        print("Good choice.")
                        print("Look! It's a rescue plane! You made it! \o/")
            elif do == "NO": 
                print("Well, there's nothing else left to eat.")
                print("You do not survive :(")
    elif do == "RIGHT": 
        print("No can do. That side is very slippery.")
        print("You fall very far into some weird cavern.")
        print("You do not survive :(")
else:
    print("You can only do actions shown in capital letters.")
    print("Try again!")