Hello, I am trying to run the example code
~/petsc-3.2-p7/src/ksp/ksp/examples/tutorials/ex50.c
I changed the extension .c to .cpp and used g++ compiler.
But, there were some errors when I compiled the code:
ex50.cpp:58: error: cannot convert
?PetscInt*? to ?PetscLogStage*? for argument ?2? to
?PetscErrorCode PetscLogStageRegister(const char*,
PetscLogStage*)?
ex50.cpp:59: error: cannot convert
?PetscInt*? to ?PetscLogStage*? for argument ?2? to
?PetscErrorCode PetscLogStageRegister(const char*, PetscLogStage*)?
ex50.cpp:326: error: cannot convert
?PetscInt*? to ?int*? for argument ?3? to ?int
MPI_Get_count(MPI_Status*, MPI_Datatype, int*)?
270
326 ierr = MPI_Get_count(&status,
MPIU_SCALAR, &inn); CHKERRQ(ierr);
327 nn = inn;
After I made the following modifications, the code was compiled successfully:
1 Change the data type of state[3] from PetscInt to PetscLogStage in line 49;
PetscLogStage stages[3];
2 Define a new variable inn as datatype of int in line 270;
3 Change the line 326 to:
ierr = MPI_Get_count(&status, MPIU_SCALAR, &inn); CHKERRQ(ierr);
4 After line 326, add:
nn = inn;
I am wondering if the modification by me is correct and are the bugs of the
example code?
The version of PETSc I am using is 3.2-p7, the compiler is MPI plus g++. Is it
because I use a c++ compiler for a c code? Thanks.
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