一些大型公司的笔试和面试题目，还是蛮有水平的的，大家可以看看 啊-Some large companies test and interview subject, still quite level, and we can look at ah

Embed your functions in a suitable test program that reads the list of numbers a le and prints out the standard deviation. The data le will contain one number per line and will have at least 10 numbers and at most 500 numbers (N will always be