import random
USER_SCORE = 0
questions = 0
classnumber = ("1","2","3")
name1= input("Enter Your Username: ")
print("Hello, " , name1)
print(" Welcome to the Arithmetic Quiz")

classno = input("What class are you in?")
while classno not in classnumber:
    print("Enter a valid class")
    print("ENTER ONLY THE NUMBER n\ 1 n\ 2 n\3")
    classno=input("What class are you in?")

while questions <10:
    for i in range(10):
        num1=random.randint(1,10)
        num2=random.randint(1,10)
        on=random.choice("*-+")
        multiply=num1*num2
        subtract=num1-num2
        addition=num1+num2

        if on == "-":
            print("MAKE SURE YOU ENTER A NUMBER OTHERWISE YOU WILL BE MARKED DOWN")
            questions+=1
            print(" Question" ,questions, "/10")
            uinput=input(str(num1)+" - "+str(num2))
            if uinput == str(subtract):
                USER_SCORE+=1
                print("     Correct, your USER_SCORE is: " ,USER_SCORE,)
            else:
                print ("    Incorrect, the answer is: " +str(subtract))
                USER_SCORE+=0

        if on == "+":
            print("MAKE SURE YOU ENTER A NUMBER OTHERWISE YOU WILL BE MARKED DOWN")
            questions+=1
            print(" Question",questions, "/10")
            uinput=input(str(num1)+" + "+str(num2))
            if uinput == str(addition):
                USER_SCORE+=1
                print("  Correct, your USER_SCORE is: ",USER_SCORE,)
            else:
                print("  Incorrect, the answer is: " +str(addition))
                USER_SCORE+=0

        if on == "*":
            print("MAKE SURE YOU ENTER A NUMBER OTHERWISE YOU WILL BE MARKED DOWN")
            questions+=1
            print(" Question",questions, "/10")
            uinput=input(str(num1)+" * "+str(num2))
            if uinput == str(multiply):
                USER_SCORE+=1
                print("  Correct, your USER_SCORE is: " ,USER_SCORE,)
            else:
                print("  Incorrect, the answer is: " +str(multiply))
                USER_SCORE+=0

if USER_SCORE >9:
    print("Well done," ,name1, "your score is" ,USER_SCORE, "/10")
else:
 print(name1," your score is " ,USER_SCORE, "/10")

def no1():
     with open("no1.txt", 'a')as file:
         file.write(str(name1)+" achieved a score of:  "+str(USER_SCORE)+"/10 \n")
def no2():
     with open("no2.txt", 'a')as file:
         file.write(str(name1)+" achieved a score of "+str(USER_SCORE)+"/10 \n")
def no3():
     with open("no3.txt", 'a')as file:
         file.write(str(name1)+" achieved a score of "+str(USER_SCORE)+"/10 \n")
if classno=="1":
    no1()
if classno=="2":
    no2()
if classno=="3":
    no3()