c - 声明主要原型(prototype)

Question

有什么原因导致我从未在 C 程序中看到 main 的原型(prototype)声明，即:

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

int main(int argc, char* argv[])
{
    return 0;
}

总是看起来不一致..

Answer 1

C 语言标准草案 n1256 :

5.1.2.2.1 Program startup

1 The function called at program startup is named main. The implementation declares noprototype for this function. It shall be defined with a return type of int and with noparameters:


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


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


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


or equivalent; ⁹⁾ or in some other implementation-defined manner.

强调我的。