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(Game: nine heads and tails) Nine coins are placed in a 3-by-3 matrix with some face up and some face down. You can represent the state of the coins using a 3-by-3 matrix with values 0 (heads) and 1 (tails). Here are some examples:
Each state can also be represented using a binary number. For example, the preceding matrices correspond to the numbers
000010000 101001100 110100001 101110100 100111110
There are a total of 512 possibilities, so you can use decimal numbers 0, 1, 2, 3, ... , and 511 to represent all states of the matrix. Write a
The user entered 7, which corresponds to 000000111. Since 0 stands for H and 1 for T, the output is correct.
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