C main 函数有多少种代参数的形式？ - C/C++ / C语言

如题， 一次笔试时被问到的。 我记得除了 void , argc argv 外还有一种带有三个参数的形式 具体在哪看过忘了...
高手出来说说都有什么形式的？

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int main( int argc, char *argv[ ], char *envp[ ] );

前两个参数标准规定的，第三个是编译器扩展的

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恩。 好像有个什么 char* env，不记得了。

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int main( int argc, char *argv[ ], char *envp[ ] );

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我也只知道2种 ，第三种是特定编译器才有的？

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有一次见到了这种int main( int argc, char *argv[ ], char *envp[ ] );

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HTML code:

ANSI C89:

2.1.2.2 Hosted environment

A hosted environment need not be provided, but shall conform to the
following specifications if present.

"Program startup"

The function called at program startup is named main . The
implementation declares no prototype for this function. It can be
defined with no parameters:

int main(void) { /*...*/ }

or with two parameters (referred to here as argc and argv , though any
names may be used, as they are local to the function in which they are
declared):

int main(int argc, char *argv[]) { /*...*/ }


If they are defined, the parameters to the main function shall obey
the following constraints:

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就两种。

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向一楼学习了

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LZ，传统的C语言，main函数是只有两种参数形式的：
一、main（） // 空的参数表
二、main(int argc , char *a