猫史档案馆

# while True:
#     b = int(input('请输入一个数'))
#     a = int(input('要加要减要成要除'))
#     c = int(input('请再输入一个数'))
#     if ('加' in a):
#         print((b + c))
#     elif ('减' in a):
#         print((b - c))
#     elif ('乘' in a):
#         print((b * c))
#     else:
#         print((b / c))
while True:
    a = int(input('请输入一个数字'))
    b = int(input('请再输入一个数'))
    c = input('要加要减要除')
    if ('加' in c):
        print((a + b))
    elif ('减' in c):
        print((a - b))
    elif ('乘' in c):
        print((a * b))
    else:
        print((a / b))