Use structure ok CPP code before

 
Struct MyStruct 
{
Int Width; 
Int Height; 
}; 

Extern "C" _declspec (dllexport) int the Add (MyStruct MyStruct) 
{
Return myStruct. Width + myStruct. Height; 
} 

CSharp code and then the upper machine

 
[StructLayout (LayoutKind. Sequential)] 
Public struct MyStruct 
{
Public int Width {get; The set; } 
Public int Height {get; The set; } 
} 

[DllImport (" OpenCvHelper. DLL)] 
Public static extern int the Add ([MarshalAs (UnmanagedType. Struct)] MyStruct MyStruct); 

Because data structure needs to be quoted PC wanted to use classes to encapsulate data, so how to do? The also want to use such a machine? Or is there any way to change my?
Only this score, I hope experienced gives directions thank you.

CodePudding user response:

Mentioned as if Microsoft can only use structure, cannot use classes,
In seen post friend leave a message, send points!

CodePudding user response:

Preach the difference between class and struct is the difference between 'reference' and 'values',
To class in the c #, c + + to receive references,

Extern "C" _declspec (dllexport) int the Add (const MyStruct & amp;
myStruct){
Return myStruct. Width + myStruct. Height;
}