文件写的怎么样?为什么我没有看到我的数据被立即写出来?

I understand the general process of writing and reading from a file, but I was curious as to what is happening under the hood during file writing. For instance, I have written a program that writes a series of numbers, line by line, to a .txt file. One thing that bothers me however is that I don't see the information written until I understand the general process of writing and