[petsc-users] Examples on solving linear systems using GMRES and/or matrix-free method

[Xiang Hao]

Thank you, Jed. It works :)



On Wed, Jun 15, 2011 at 11:08 AM, Jed Brown <jed at 59a2.org> wrote:

> On Wed, Jun 15, 2011 at 19:05, Xiang Hao <haoxiang at yahoo.cn> wrote:
>
>> Now, I have a problem when I try to change the above to a c++ version(I
>> want to use a class).
>
>
> Set the class pointer as the application context and use a simple wrapper:
>
>  MatMult_Wrapped(Mat A,Vec X,Vec Y) {
>   TheClass *cls;
>   MatShellGetContext(A,&cls);
>   return cls->matmult(A,X,Y);
> }
>
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