error: no match for call to '(std::vector<double>) (libMesh::Real)'

[LiuPengPeter]

Hello guys,
I try to add a vector _M whose components are constant.
In the constructor function,
_M(_etas_num*_etas_num, 0.0),
for (unsigned int i = 0; i < _etas_num; ++i)
{
for (unsigned int j = 0; j < _etas_num; ++j)
{
if (0<i && i<_etas_num && j==_etas_num)
_M(i*_etas_num+j)=1e-6;
else if (0<j && j<_etas_num && i==_etas_num)
_M(i*_etas_num+j)=1e-6;
else
_M(i*_etas_num+j)=7e-8;
}
}
In the .h file,
std::vector _M;

It shows such error:
ACMultiR1.C:39:25: error: no match for call to '(std::vector) (libMesh::Real)'
_M(i_etas_num+j)=1e-6;*
And another question:
ACMultiR1.C:39:25: error: no match for call to '(std::vector) (libMesh::Real)'
_M(i_etas_num+j)=1e-6;*

I have tried to correct it, but still failed. Could anyone help?
ACMultiR1.zip

[aeslaughter]

In the .h file,
std::vector _M;

This is not the correct definition of a vector: https://en.cppreference.com/w/cpp/container/vector

I suggest you take some time to learn C++, we have some links on this page to some nice resources: https://mooseframework.inl.gov/getting_started/examples_and_tutorials/

[LiuPengPeter]

Thank you for your reply.
Sorry. In my question, I ignored it. But that's std::vector _M in the attachment.
After sleeping, I find the bug is that () was used when using vector's components...

There is still an error about another problem.
Could you help me check it? Bugs are so suffering...
Second: ACMultiR1.C:77:21: error: invalid types 'libMesh::Real {aka double}[unsigned int]' for array subscript sum += 2/_Np[_qp]_x[_index_var][_qp]_x[j][_qp]_M[_index_var_etas_num+j][_qp]_E[_index_var_etas_num+j][_qp]/2

[aeslaughter]

 _M(i*_etas_num+j)=1e-6;

std::vectors use [] not (), which is very basic C++. Please spend some time going through some C++ tutorials.

[LiuPengPeter]

Yeah. That's very basic. I wrote () and [] in the same file...

I correct them, but there is still a problem about my Residual.

home/l/projects/park/src/Kernels/ACMultiR1.C:77:21: error: invalid types 'int[unsigned int]' for array subscript
sum += 2/_Np[_qp]_x[_index_var][_qp]_x[j][_qp]_M[_index_var_etas_num+j][_qp]_E[_index_var_etas_num+j][_qp]/2*(_grad_u[_qp]-_grad_etas[j][_qp])_grad_test[_i][_qp];
^
/home/l/projects/park/src/Kernels/ACMultiR1.C:77:41: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator >::value_type {aka int}[unsigned int]' for array subscript
sum += 2/_Np[_qp]_x[_index_var][_qp]_x[j][_qp]_M[_index_var*_etas_num+j][_qp]_E[_index_var_etas_num+j][_qp]/2*(_grad_u[_qp]-_grad_etas[j][_qp])_grad_test[_i][_qp];
^
/home/l/projects/park/src/Kernels/ACMultiR1.C:77:52: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator >::value_type {aka int}[unsigned int]' for array subscript
sum += 2/_Np[_qp]_x[_index_var][_qp]_x[j][_qp]_M[_index_var*_etas_num+j][_qp]_E[_index_var_etas_num+j][_qp]/2*(_grad_u[_qp]-_grad_etas[j][_qp])_grad_test[_i][_qp];
^
/home/l/projects/park/src/Kernels/ACMultiR1.C:77:84: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator >::value_type {aka double}[unsigned int]' for array subscript
sum += 2/_Np[_qp]_x[_index_var][_qp]_x[j][_qp]_M[_index_var*_etas_num+j][_qp]_E[_index_var_etas_num+j][_qp]/2*(_grad_u[_qp]-_grad_etas[j][_qp])_grad_test[_i][_qp];
^
/home/l/projects/park/src/Kernels/ACMultiR1.C:77:116: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator >::value_type {aka double}[unsigned int]' for array subscript
sum += 2/_Np[_qp]_x[_index_var][_qp]_x[j][_qp]_M[_index_var*_etas_num+j][_qp]_E[_index_var_etas_num+j][_qp]/2*(_grad_u[_qp]-_grad_etas[j][_qp])*_grad_test[_i][_qp];
^
In file included from /home/l/projects/park/build/unity_src/Kernels_Unity.C:2:0:
/home/l/projects/park/src/Kernels/ACMultiR1.C:77:133: error: no match for 'operator-' (operand types are 'const libMesh::VectorValue' and 'const MooseArray<libMesh::VectorValue >')
ACMultiR1.zip

[LiuPengPeter]

I delete some [_qp], then it works well.