The signed division will take more time to execute because it rounds towards zero, while a shift rounds towards minus infinity.
有符号的除法要耗费更多的时间，因为除法是使最终结果趋向于零的，而移位则是趋向于负无穷。
2
Because filenum will always be less than filecount, the integer division filenum/filecount will always produce zero, so each iteration of the loop will echo
Also at the library's Theater Division are letters the actor Zero Mostel wrote to his wife, Kate, that catalog his every "gaseous" meal and bodily function.