Ptt 大爆卦 | String null C++ - 前往 https://trust-in-soft.com/blog/2019/07/09/printing-a-null-pointer-with-s-is-undefined-behavior/

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並前往https://trust-in-soft.com/blog/2019/07/09/printing-a-null-pointer-with-s-is-undefined-behavior/

Printing a null pointer with %s is undefined behavior - TrustInSoft

The C standard makes it undefined to pass anything other than a pointer to a null-terminated string as second argument to printf("%s", .

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