Question

需要为我的计算器添加一个循环，方法是让用户选择重新启动计算器，方法是将代码置于while循环中，条件是用户的输入应该是，＆＃39; y＆＃39;或者＆＃39; Y＆＃39;。

def add(x, y):
   return x + y

def subtract(x, y):
   return x - y

def multiply(x, y):
   return x * y

def divide(x, y):
   return x / y

print("Select operation.")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")

choice = input("Enter choice(1/2/3/4):")

num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))

if choice == '1':
   print(num1,"+",num2,"=", add(num1,num2))

elif choice == '2':
   print(num1,"-",num2,"=", subtract(num1,num2))

elif choice == '3':
   print(num1,"*",num2,"=", multiply(num1,num2))

elif choice == '4':
   print(num1,"/",num2,"=", divide(num1,num2))
else:
   print("Invalid input")

Answer 1

只需在亚历克斯的帖子中添加一些东西

cont = "y"
while cont.lower() == "y":
    print("Select operation\n1.Add\n2.Subtract\n3.Multiply\n4.Divide")

    choice = input("Enter choice(1/2/3/4):")

    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))

    if choice == '1':
       print(num1,"+",num2,"=", (num1 + num2))

    elif choice == '2':
       print(num1,"-",num2,"=", (num1 - num2))

    elif choice == '3':
       print(num1,"*",num2,"=", (num1 * num2))

    elif choice == '4':
       print(num1,"/",num2,"=", (num1 / num2))
    else:
       print("Invalid input")
    cont = input("Continue?y/n:")
    if cont == "n":
        break

Answer 2

这是一个while循环示例：

<强>更改

again = "y"
while again:
    # ...
    #enter your code here
    # ...
    a = input("do you want to do again (y/Y): ")
    if a not in ("y","Y"):
        a=""

Answer 3

不要真正看到问题所在，你可以使用另一个输入语句并检查while循环条件中的值......

cont = "y"
while cont == "y" or cont == "Y":
    print("Select operation.")
    print("1.Add")
    print("2.Subtract")
    print("3.Multiply")
    print("4.Divide")

    choice = input("Enter choice(1/2/3/4):")

    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))

    if choice == '1':
       print(num1,"+",num2,"=", (num1 + num2))

    elif choice == '2':
       print(num1,"-",num2,"=", (num1 - num2))

    elif choice == '3':
       print(num1,"*",num2,"=", (num1 * num2))

    elif choice == '4':
       print(num1,"/",num2,"=", (num1 / num2))
    else:
       print("Invalid input")
    cont = raw_input("Continue?y/n:")

Answer 4

你可以像这样修改你的代码

def continue():
    resp = input("Continue ? Y/N ")
    if resp == "n" or resp == "N":
        return False
    return True
while True:
    print("Select operation.")
    print("1.Add")
    print("2.Subtract")
    print("3.Multiply")
    print("4.Divide")

    choice = input("Enter choice(1/2/3/4):")

    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))

    if choice == '1':
       print(num1,"+",num2,"=", (num1 + num2))

    elif choice == '2':
       print(num1,"-",num2,"=", (num1 - num2))

    elif choice == '3':
       print(num1,"*",num2,"=", (num1 * num2))

    elif choice == '4':
       print(num1,"/",num2,"=", (num1 / num2))

    else:
       print("Invalid input")
    if not continue() :
       break

您可以根据需要更改继续功能

Answer 5

enter code here
    while True:
        b = int(input('first num: '))
        c = input('operator: ')
        d = int(input('second num: '))
        if c == '+':
            print(b + d)
        elif c == '-':
            print(b - d)
        elif c == '*':
            print(b * d)
        elif c == '/':
            print(b / d)
        q = input('do you want to continue?: ')
        if q == 'y':
            continue
        else:
            break

Answer 6

这是另一个while循环示例

menu ="""
 0. chose 0 to quit
 1. chose 1 to add
 2. chose 2 to sub
 3. chose 3 to multi
 4. chose 4 to div

"""
chose= None


while(chose != 0):
    print(menu)
    num1 =int(input('first num is: '))
    num2 =int(input('second num is: '))
    chose= int(input("plz enter your chose: "))
    if(chose == 1):

        print(num1, " + ",num2," = ",num1+num2)
    elif(chose == 2):
        print(num1, " - ",num2," = ",num1+num2)
    elif(chose == 3):
        print(num1, " * ",num2," = ",num1+num2)
    elif(chose == 4):
        if(num2 == 0):
            print("You can not divide by zero")
        else:
            print(num1, " / ",num2," = ",num1+num2)
    else:
        print('plz enter a correct option')

Python中的计算器循环

6 个答案: