integer division

基本解释

It's doing integer division.
这是整数的除法。
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
由于 filenum 始终小于 filecount，整数除法 filenum/filecount 将始终生成 0，因此每次迭代循环都将生成
In such cases, integer division and modulus operations are performed in software —something to think about if you're designing a hash table or doing lots of math.
这种情况下，整型除法和求模运算是通过软件实现的，就像当你设计Hash表，或是做大量的算术那样。