//// 2.1.nullptr.cpp// chapter 2 language usability// modern cpp tutorial//// created by changkun at changkun.de// https://github.com/changkun/modern-cpp-tutorial//#include <iostream>#include <type_traits>void foo(char *);void foo(int);int main() {if (std::is_same<decltype(NULL), decltype(0)>::value)std::cout << "NULL == 0" << std::endl;if (std::is_same<decltype(NULL), decltype((void*)0)>::value)std::cout << "NULL == (void *)0" << std::endl;if (std::is_same<decltype(NULL), std::nullptr_t>::value)std::cout << "NULL == nullptr" << std::endl;foo(0); // will call foo(int)// foo(NULL); // doesn't compilefoo(nullptr); // will call foo(char*)return 0;}void foo(char *) {std::cout << "foo(char*) is called" << std::endl;}void foo(int i) {std::cout << "foo(int) is called" << std::endl;}
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。