Pointer and REF

Question

Hi i need to know about mapping c and C# types in C if it int* it ref int in c# how to get int**int*** ? and what is the equivalent type in c for double? Thanks Guruparan G

Sam Hobbs · Answer

I would not say that int* in C is the same as ref int in C# just as a reference in C++ is not the same thing as a pointer in C/C++. Did you get an answer to the queston of how to get a pointer to a pointer and such? The following shows how. int i = 162753; unsafe { int * pi = &i; int ** ppi = &pi; Console .WriteLine(  { 0 } { 1 } { 2 }   i *pi **ppi); }

Vulpes · Answer

You can only get double and triple pointers to int in C# using unsafe code where the syntax is exactly the same as it is in C. Notice also that whilst 'ref int' is equivalent to int* when passing parameters to a method it cannot be used in other situations. In other cases you have to use IntPtr or int* in unsafe code. The equivalent of double in C is double in C#. Both are 8 byte floating point numbers.