C++ 的精确十进制数据类型?

2021-12-25 00:00:00 decimal precision c types c++

PHP 有一个十进制类型，它没有浮点数和双精度数的不准确"，所以 2.5 + 2.5 = 5 而不是 4.999999999978325 或类似的东西.

PHP has a decimal type, which doesn't have the "inaccuracy" of floats and doubles, so that 2.5 + 2.5 = 5 and not 4.999999999978325 or something like that.

所以我想知道 C 或 C++ 是否有这样的数据类型实现?

So I wonder if there is such a data type implementation for C or C++?

推荐答案

是:

C++ 有任意精度的库.
一个很好的例子是 GNU 多精度算术库.

There are arbitrary precision libraries for C++.
A good example is The GNU Multiple Precision arithmetic library.

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