L9_A
最大公因數
Greatest Common Divisor
河內塔
Tower of Hanoi
L9_B
三座城堡
Three Castles
sample code:
https://gist.github.com/htchen/e86a7d4293d6b33e2dce
四個皇后
Four Queens
sample code:
https://gist.github.com/htchen/f0082a35ff9d04231cfd
L9_C
換銅板
Make Change
sample code:
https://gist.github.com/htchen/1613e9c8835f90b7b009
編譯包含多個 .c 檔的專案
L9_D
列舉所有的二進位位元
Show all possible permutations of the binary bits
四則運算判讀
prefix to infix
sample code:
https://gist.github.com/htchen/2b364d1bf9674ea31903