想问下大家如何用for loop来实现数字空心菱形的编写

tonylini

The function diamond :

• takes one parameter N (type int ), its value must be odd and in the range [3, 99]

• it draws a square shape made of integer values and spaces:

– integer values are always printed with 2 digits (for example, value 7 is printed 07 )

– every line consists of integer values from 1 up to N , where some values  have  to be  replaced by spaces instead

– the first and last row are full (no space)

– the middle row is empty except for values 1 and N ,

– each row from the first one to the middle one is increasingly empty from its center

each row from the middle one to the last one is increasingly full to its center

                               
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tonylini

                               
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