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main 函数不应被调用、重载或被 inline、static 等关键字限定

8.2 ID_illFormedMain
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main 函数作为程序的入口是一种特殊的函数,其链接性由实现定义,不应被调用、重载或被任何函数限定符修饰。

示例:

int main();   // The main function does not need to be declared

int foo() {
    return main();   // Non-compliant
}

int main(const char* p) {   // Non-compliant
    ....
}

inline int main() {   // Non-compliant
    ....
}

依据

ISO/IEC 9899:1999 6.7.4(4) ISO/IEC 9899:2011 6.7.4(4) ISO/IEC 14882:2003 3.6.1(2 3)-implementation ISO/IEC 14882:2011 3.6.1(2 3)-implementation ISO/IEC 14882:2017 6.6.1(2 3)-implementation
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