很久以前，函数被称为“子程序”(我知道，我这样说证明我已经老了！)管理复杂性的主要方式之一是自顶向下的编程模式。

A long time ago, when functions were called "subroutines" (I'm dating myself, I know), one of the main ways to manage complexity was top-down programming.

youdao

子程序有两种形式——过程或函数。

Subprograms occur in one of two forms — procedures or functions.

youdao

需要在主程序中调用initialize_vertices函数，因此把函数调用添加到位于第597行的main子程序中。

The initialize_vertices function needs to be called in the main program, so add the function call in the main subroutine at line 597.

youdao