null pointer constant造句

C + + didn't adopt the same behavior, allowing only 0 as a null pointer constant.
C + + 11 corrects this by introducing a new keyword to serve as a distinguished null pointer constant : nullptr.
Since the dawn of C in 1972, the constant 0 has had the double role of constant integer and null pointer constant.
In C + +, while the NULL macro was inherited from C, the integer literal for zero has been traditionally preferred to represent a null pointer constant.
The macro NULL is defined as an implementation-defined null pointer constant, which in C99 can be portably expressed as the integer value 0 converted implicitly or explicitly to the type void *.
It's difficult to find null pointer constant in a sentence. 用null pointer constant造句挺难的

In appropriate contexts in source code, such as for assigning to a pointer variable, a " null pointer constant " can be written as 0, with or without explicit casting to a pointer type, or as the NULL macro defined by several standard headers.
When T has the nested type foobar defined, the instantiation of the first test works and the null pointer constant is successfully passed . ( And the resulting type of the expression is yes . ) If it does not work, the only available function is the second test, and the resulting type of the expression is no . ( An ellipsis is used not only because it will accept any argument, but also because its conversion rank is lowest, so a call to the first function will be preferred if it is possible; this removes ambiguity .)