类型"long"和"long"之间有什么区别?在C ++/CLI和C#中? [英] What is the difference between type "long" in C++/CLI and C#?

问题描述

在 C ++/CLI 项目中，我有方法 void DoSomething(long x); .如果我想在用 C#编写的任何单元测试中使用它，则方法参数 x 会显示为类型 int .

In the C++/CLI project I have the method void DoSomething(long x);. If I want to use it in any unit-test written in C#, the method parameter x shows up as type int.

为什么我必须在单元测试(C#)中将签名更改为 void DoSomething(long long x); 并将其与类型为 long 的参数一起使用?

Why do I have to change the signature to void DoSomething(long long x); to use it with parameters of type long in my unit-tests (C#)?

推荐答案

在C#中， long 是64位数据类型.在C ++中，我们对 long 所了解的全部是，它必须容纳的内容与 int 一样多或更多，并且至少为32位.如果您在c ++中使用 long long ，保证至少64位，它将与C#中的内容匹配.

In C# long is a 64 bit data type. In C++ All we know about long is that it has to hold as much or more than an int and it is at least 32 bits. If you use a long long in c++ that is guaranteed to be at least 64 bits which will match what you have in C#.

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