什么比双重大? [英] What's bigger than a double?
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问题描述
是否有一个比double更大的本地c ++变量类型?
float是7
double是15(当然取决于编译器)
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Is there a native c++ variable type that's "bigger" than a double?
float is 7
double is 15 (of course depending on the compiler)
Is there anything bigger that's native, or even non-native?
推荐答案
C ++有 long double
,但不能保证它比任何一个简单的 double
更精确。在x86平台上,通常 double
是64位, long double
是64或80位
C++ has long double
, but there is no guarantee that it's any more precise than a plain double
. On an x86 platform, usually double
is 64 bits, and long double
is either 64 or 80 bits (which gives you 19 significant figures, if I remember right).
您的里程可能会有所不同,特别是如果您不在x86上。
Your mileage may vary, especially if you're not on x86.
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