问:应该买多少只公鸡母鸡和小鸡,一共有几种买法
  设:公鸡为x只,母鸡为y只,小鸡为z只
  x = 0
  while x <= 100:
  y = 0
  while y <= 100:
  z = 0
  while z <= 100:
  if x + y + z == 100 and 5 x +3 y +0.5 * z == 100:
  print(x,y,z)
  z += 1
  y += 1
  x += 1
下图为以上代码运行结果:
图片描述


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