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In C++11, nullptr [1] is the strongly typed value to use instead of the macro NULL [2]. Use everywhere [3][4]. [1] nullptr, the pointer literal (since C++11) https://en.cppreference.com/w/cpp/language/nullptr [2] NULL https://en.cppreference.com/w/cpp/types/NULL [3] Bjarne Stroustrup's C++ Style and Technique FAQ, Should I use NULL or 0? https://www.stroustrup.com/bs_faq2.html#null "In C++, the definition of NULL is 0, so there is only an aesthetic difference. I prefer to avoid macros, so I use 0. Another problem with NULL is that people sometimes mistakenly believe that it is different from 0 and/or not an integer. In pre-standard code, NULL was/is sometimes defined to something unsuitable and therefore had/has to be avoided. That's less common these days. If you have to name the null pointer, call it nullptr; that's what it's called in C++11. Then, "nullptr" will be a keyw...40665913
