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POHow to call C++ class from C#
 

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  1. POHow to call C++ class from C#
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    <p>I suppose I have to create a managed C++ code to wrap the native C++. But I have the problem while trying to wrap an array used in function parameter whose type is defined in native C++. The native C++ code is as follows:</p> <pre><code>//unmanageCPP.h class __declspec(dllexport) unmanageMoney { public: unmanageMoney(int a, int b) { rmb = a; dollar = b; } unmanageMoney() { rmb = 0; dollar = 0; } int rmb; int dollar; }; class __declspec(dllexport) unmanageSum { public: //how to wrap this funciton? int addDollar(unmanageMoney a[], unmanageMoney b[]); }; //unmanageCPP.cpp #include "unmanaged.h" int unmanageSum::adddollar(unmanageMoney a[], unmanageMoney b[]) { return a[0].dollar + b[0].dollar; } </code></pre> <p>Could anyone tell me how to write the manageCPP.h? Thanks very much!</p> <p><strong>Update</strong></p> <p>I compose the manageCPP.h as follows, but I don't know how to write addDollar()</p> <pre><code>//first, I wrap the class unmanageMoney for use in manageSum::addDollar() public ref class manageMoney { private: unmanageMoney* mMoney; public: unmanageMoney getMoney() { return *mMoney; } manageMoney(int a, int b) { mMoney = new unmanageMoney(a, b); } ~manageMoney() { delete mMoney; } }; public ref class manageSum { // TODO: Add your methods for this class here. private: unmanageSum *mSum; public: manageSum() { mSum = new unmanageSum(); } ~manageSum() { delete mSum; } //it must be wrong if I code like this, for unmanageSun::adddollar() only // receives unmanageMoney as arguments. So what should I do? int adddollar(manageMoney a[], manageMoney b[]) { return mSum-&gt;adddollar(a, b); } }; </code></pre>
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    1. CO@CDBean If you have updates to your question or more details to provide, please edit your original question to include the new data.
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    2. COYou probably want `cli::array<manageMoney^> a` for your arguments to `addDollar`, this will show up in C# as `manageMoney[] a`.
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    3. COFor `unmanagedSum::adddollar`, are you sure you want `unmanagedMoney a[]` and not `const unmanagedMoney& a`? You appear to only want the first item in the array, which could be done with a reference (or pointer) instead.
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      1. USJoel Rondeau
 

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