C# 等效于 C++ 中的 64 位 unsigned long long

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时间:2020-08-10 13:24:55  来源:igfitidea点击:

C# equivalent of 64-bit unsigned long long in C++

c#c++long-integerunsignedulong

提问by Gags

I am building a DLL which will be used by C++ using COM. Please let me know what would be the C# equivalent of C++ 64-bit unsigned long long.

我正在构建一个将由 C++ 使用 COM 使用的 DLL。请让我知道 C++ 64-bit 的 C# 等效项是什么unsigned long long

Will it be ulong type in C# ? Please confirm.

它会是 C# 中的 ulong 类型吗?请确认。

Thanks, Gagan

谢谢,加根

回答by Dzmitry Martavoi

Maybe this will help you:

也许这会帮助你:

  • ulong(64-bit unsigned integer)
  • double(64-bit floating-point number).
  • ulong(64 位无符号整数)
  • double(64 位浮点数)。

回答by Ivan Ishchenko

Since C++11, you can use these:

从 C++11 开始,您可以使用这些:

  • int8_t
  • int16_t
  • int32_t
  • int64_t
  • uint8_t
  • uint16_t
  • uint32_t
  • uint64_t
  • int8_t
  • int16_t
  • int32_t
  • int64_t
  • uint8_t
  • uint16_t
  • uint32_t
  • uint64_t

Their size is guaranteed to remain the same regardless of anything.

无论发生什么,它们的大小都保证保持不变。

http://en.cppreference.com/w/cpp/types/integer.

http://en.cppreference.com/w/cpp/types/integer

回答by HerpDerpington

For anything that goes beyond ulong, you might as well use the C# BigIntegerStructure.

对于超出范围的任何内容ulong,您不妨使用 C#BigInteger结构

回答by Davide Cannizzo

In C++, each integer type doubles its size when running on a 64-bit machine, rather than a 32-bit one.
Therefore, stating that C# intor longcould be equivalent to C++ intor longis incorrect.

在 C++ 中,当在 64 位机器上运行时,每种整数类型的大小都会加倍,而不是在 32 位机器上运行。
因此,声明 C#intlong可能等同于 C++intlong不正确。

Rather, in C# there is a type called IntPtr, which was exclusively made for P/Invoke. Indeed, this one changes its size from 4 bytes on a 32-bit machine to 8 bytes on a 64-bit machine, and so this is the correct equivalent of the C++ unsigned longor Windows ULONG.

相反,在 C# 中有一个名为 的类型IntPtr,它专为 P/Invoke 制作。事实上,这将它的大小从 32 位机器上的 4 个字节更改为 64 位机器上的 8 个字节,因此这是 C++unsigned long或 Windows的正确等价物ULONG