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  age = int(input("请输入年龄:")) if age>=18:     print("你成年了,可以去网吧了")     print("还可以玩吃鸡了")
 
 
 
  if age>=60:     print("您老了, 该跳广场舞了") else:     print("还年轻")
 
 
  if age<18:     print("还未成年") elif age<40:     print("青年") elif age<60:     print("中年") else:     print("老年")
 
 
  a = 100 b = 20 if a > b:     print(a) elif a == b:     print("a == b") else:     print(b)
 
 
  a = 20 b = 30 c = 40
  if a>b:     if a>c:         print("最大值是:", a)     else:         print("最大值是:", c)
  else:     if b>c:         print("最大值是:", b)     else:         print("最大值是:", c)
 
 
 
 
 
 
 
 
 
 
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