After the function has been completed, the return pointer is used to go back to the original location and the program can continue.

当完成该函数之后，使用返回指针回到原来的位置并继续程序。

youdao

You can then use the return pointer to configure other aspects of the virtual file, such as the function to call when a read is performed on the file.

然后就可以使用这个返回的指针来配置这个虚拟文件的其他参数，例如在对该文件执行读操作时应该调用的函数。

youdao

It says, if I want to print out something I built in Cartesian form up here, says, again, I'm going to pass it in a pointer to the instance, that self thing, and then I'm going to return a string that I combine together with an open self and close paren, a comma in the middle, and getting the x-value and the y-value and converting them into strings before I put the whole thing together.

这不仅仅是个列表,它是怎么来做的？,流程是：如果我想要返回,一些已经在笛卡尔模式下建好的值，好，再说一遍，我首先要传入一个,指向实例的指针,也就是，然后我会返回一个,由开括号，闭括号,中间的一个逗号,以及提前转换为字符串格式的。

麻省理工公开课 - 计算机科学及编程导论课程节选