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Pointer and REF

Guruparan Giritharan

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

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs14y ago
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 = π

Console .WriteLine("{0} {1} {2}" , i, *pi, **ppi);

}
Vulpes14y ago
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.