conversion specifier to print it as decimal? Because pointers can be *converted* to numbers. Note that intptr_t doesn't necessarily exist; in particular, it won't exist if there is no integer type big enough to hold the converted value of a pointer without loss of information. Similarly...
C++对基本类型进行分类,形成了若干个族.类型signed char,short,int和long统称为符号类型;它们的无符号版本统称为无符号类型;C++11新增了long long,bool,wchar_t,符号整型和无符号整型;C++11新增了char16_t和char32_t.float,double和long double统称为浮点型....