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Python学习_2_通过猜数字学习循环,其中三段不同实现代码
lucky_number = 57
def first_way():
"""这是第一种方式:
1、用while循环;
2、有循环计数变量;
3、在while语句外定义guess_number变量。
"""
global lucky_number
guess_number = int("0")
loop_count = 0
while guess_number != lucky_number and loop_count <= 2:
guess_number = int(input("Input Number:"))
if guess_number == lucky_number:
print("You Are Right!")
break
elif loop_count == 2:
print("Your Are Fail!")
break
elif guess_number > lucky_number:
print("Your input number to big")
loop_count += 1
elif guess_number < lucky_number:
print("Your input number to small")
loop_count += 1
def second_way():
"""这是第二种实现方式:
1、用while循环;
2、有计数变量;
3、guess_number在while内部;
4、增加running变量判断是否猜正确,其实可以在方法一的判断更好。
"""
global lucky_number
running = True
loop_count = 0
while running and loop_count < 3:
guess_number = int(input("Input Number:"))
if guess_number == lucky_number:
print("You Are Right!")
running = False
elif loop_count == 2:
print("Your Are Fail!")
break
elif guess_number > lucky_number:
print("Your input number to big")
loop_count += 1
elif guess_number < lucky_number:
print("Your input number to small")
loop_count += 1
def third_way():
"""这是第三种实现方式:
1、用for循环;
2、无单独定义计数变量;
3、guess_number在for内部;最优解。
"""
global lucky_number
for i in range(3):
guess_number = int(input("Input Number:"))
if guess_number == lucky_number:
print("You Are Right!")
break
elif i == 2:
print("Your Are Fail!")
elif guess_number > lucky_number:
print("Your input number to big")
elif guess_number < lucky_number:
print("Your input number to small")
third_way()
Python学习_2_通过猜数字学习循环,其中三段不同实现代码
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