在执行主要方法 [英] Execution at main method

问题描述

斐伊川，

我们通常看到程序执行像C，C ++，Java的语言的主要方法开始（我所熟悉的这些）。我想知道编译器如何知道主在程序方法presence。

We generally see that the program execution begins in the main method for the languages like C , C++ , Java (i am familiar with these). I want to know how the compiler knows the presence of MAIN method in the program .

什么是主方法表示，除了这是执行程序的入口点......如何这些标准的差异，C，C ++ ...

What does the main method signify besides that it is the entry point for program execution ...How does these criteria differ for C , C++ ...

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推荐答案

通常，在每个C或C ++程序开始执行code（包括通常由编译器/链接默认）做了一些初始化和然后调用一个名为主要功能。如果该函数不present，它将链接的程序（其中所有的名字必须解决）时导致一个悬而未决的名称。如果是present，它会被程序初始化code被调用。

Generally, the code that is executed at the beginning of every C or C++ program (included usually by default by compilers/linkers) does some initialization and then calls a function called main. If this function is not present, it will lead to an unresolved name when linking a program (in which all the names have to be resolved). If it is present, it will be called by the program initialization code.

初​​始化code做一些家务（例如，转换的主要功能为程序的退出code中的返回值，等等。）

The initialization code does some housekeeping (for example, converts the return value of the main function to the exit code of the program, etc.)

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