小编Wil*_*reu的帖子

请输入两个数字和一个字母.如果字母是"a",则数字将被添加,如果"s",则减去,如果"m",则相乘,如果"d",则减去.

这就是我所拥有的:

num1 = int(input("please enter the first number"))
num2 = int(input("please enter the second number"))
lettler = input("please enter the operation")

a = int(num1 + num2)
s = int(num1 - num2)
m = int(num1 * num2)
d = int(num1 / num2)

if lettler + str(a):
    print(num1 + num2)
else:
    if lettler + str(s):
        print(num1 - num2)
    else:
        if lettler + str(m):
            print(num1 * num2)
        else:
            if lettler + str(d):
                print(float(num1) / num2)

但我的教授告诉我这是错的.我该怎么办才能修复它？