重新源$ C ​​$ C以增强可读性presenting大的数字？ [英] Representing big numbers in source code for readability?

问题描述

是否有书面的C ++或C？

Is there a more human-readable way for representing big numbers in the source code of an application written in C++ or C?

让我们比如拿号 2,345,879,444,641 ，C或C ++如果我们想要一个程序来恢复这个数字，我们会做返回2345879444641 。

let's for example take the number 2,345,879,444,641 , in C or C++ if we wanted a program to return this number we would do return 2345879444641.

但是，这是不是真的读。

But this is not really readable.

在PAWN（一种脚本语言）比如我可以做收益2_345_879_444_641 甚至收益2_34_58_79_44_46_41 键，这些都将返回数 2,345,879,444,641 。

In PAWN (a scripting language) for example I can do return 2_345_879_444_641 or even return 2_34_58_79_44_46_41 and these both would return the number 2,345,879,444,641.

这是对人眼更具有可读性。

This is much more readable for the human-eye.

是否有一个C或C ++相当于呢？

Is there a C or C++ equivalent for this?

推荐答案

下面是一个宏，将做到这一点，在两个MSVC和GCC测试。在升压不依赖...

Here's a macro that would do it, tested on both MSVC and GCC. No reliance on Boost...

#define NUM(...) NUM_(__VA_ARGS__, , , , , , , , , , )
#define NUM_(...) NUM_MSVCHACK((__VA_ARGS__))
#define NUM_MSVCHACK(numlist_) NUM__ numlist_
#define NUM__(a1_, a2_, a3_, a4_, a5_, a6_, a7_, a8_, ...) a1_##a2_##a3_##a4_##a5_##a6_##a7_##a8_

使用它像：

int y = NUM(1,2,3,4,5,6,7,8);
int x = NUM(100,460,694);

产地：

int y = 12345678;
int x = 100460694;

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