什么比双重大？ [英] What's bigger than a double?

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）
$

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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