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HUGE_VALL

巨量[医]VALF，巨大[医]瓦尔，巨大[医]沃尔

Defined in header ​​
#define HUGE_VALF /*implementation defined*/​(since C++11)
#define HUGE_VAL /*implementation defined*/​​
#define HUGE_VALL /*implementation defined*/​(since C++11)

大HUGE_VALF，，，HUGE_VAL和HUGE_VALL宏扩展为正浮点常量表达式，该表达式与浮点函数和运算符在溢出时返回的值相等，请参见math_errhandling29%。

ConstantExplanation
HUGE_VALFExpands to positive float expression that indicates overflow
HUGE_VALExpands to positive double expression that indicates overflow, not necessarily representable as a float
HUGE_VALLExpands to positive long double expression that indicates overflow, not necessarily representable as a float or double

在支持浮点无穷大的实现中，这些宏总是扩展到float，，，double，和long double分别。

另见

INFINITY (C++11)evaluates to positive infinity or the value guaranteed to overflow a float (macro constant)

C文件[医]瓦尔

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