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print(cmath.nan) Try it Yourself » Definition and Usage Thecmath.nanconstant returns a floating-point nan (Not a Number) value. This value is not a legal number. The nan constant is equivalent tofloat("nan")ormath.nan. Syntax
Print the value of nanj: #Import cmath Libraryimport cmath # Print the value of nan print (cmath.nanj)print (type(cmath.nanj)) Try it Yourself » Definition and UsageThe cmath.nanj constant returns a complex nan (Not a Number) value. This value has a 0 real part, and nan ...
Represents a value that is not a number (NaN). This field is constant. Namespace: System Assembly: mscorlib (in mscorlib.dll) Syntax C# 複製 public const double NaN Remarks The value of this constant is the result of dividing zero by zero. This constant is returned when the result of...
Represents a value that is not a number (NaN). This field is constant. Namespace: System Assembly: mscorlib (in mscorlib.dll) Syntax C# Copy public const double NaN Remarks The value of this constant is the result of dividing zero by zero. This constant is returned when the result of...
struct dummy { virtual ~dummy() {} }; struct S : public dummy { virtual ~S(); int i; double d; }; 标准库Visual Studio 2013 中的 C++ 编译器可以检测到 _ITERATOR_DEBUG_LEVEL 中的不匹配(这是在 Visual Studio 2010 中实现的),以及 RuntimeLibrary 不匹配。 当编译器选项 /MT(静态发布)、...
c/c++语言具备一个不同于其他编程语言的的特性,即支持可变参数。 例如C库中的printf,scanf等函数,都支持输入数量不定的参数。printf函数原型为 int printf(const char *format, …); printf("hello world");///< 1个参数printf("%d", a);///< 2个参数printf("%d, %d", a, b);///< 3个参数 测...
floating constant 一个没有任何固定的浮点常量具有类型double。如果后缀是字母f或者F,浮动常数是类型的float。如果后缀是字母l或者L,浮动常数是类型的long double。 如果由 FLT_EVAL_METHOD 指示,则浮点常量可能会转换为更多的范围和精度。例如,在表达式中,常数0.1f可能表现为0.1L。
template <typename T> void myfunc(T h) { } template<> static void myfunc(double h) // static is ignored { } A constant used in a static_assert inside a class template will always fail. The following code causes the static_assert to always fail: C++ Copy template <size_t some_val...