'mwIndex' does not name a type

Environment: Matlab R2017a/Windows 10/MinGW64 Compiler (C++)

When I run the following codes, I encounter some errors:

# include "math.h"
void CSR_VecMult_CaABC_double(
               const int k,  const int m, const double alpha,
               const double *val, const mwIndex *indx, 
               const mwIndex *pntrb,
               const double *b,  
               double *c)
{
double t;
const double *pval;
int i,j,jb,je;

    pval = val;
    for (i=0;i!=m;i++) {
      t = 0;
      jb = pntrb[i];
      je = pntrb[i+1];
      for (j=jb;j!=je;j++)
        t += alpha * b[indx[j]] * (*pval++);
      c[i] += t;
    }
}

The warning is as follow:

>>mex -largeArrayDims a_times_b_cmplx.cpp
D:\Ncut_9\a_times_b_cmplx.cpp:52:43: error: 'mwIndex' does not name a type
                  const double *val, const mwIndex *indx,
                                           ^
D:\Ncut_9\a_times_b_cmplx.cpp:53:24: error: 'mwIndex' does not name a type
                  const mwIndex *pntrb,

Actually I've tried to use another compiler such as Visual C++, but more errors occurred. :-(

Answer 1

[Steven Lord]

Did you include the right header file?