空心三角形练习

#崔鑫阳 2019.2.24 star_num=int(input("请输入星星的层数")) for i in range(star_num): for t in range(i+star_num): if t==star_num-i-1 or t==star_num+i-1 or i==star_num-1: print("*",end='')

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