Double management

/* 
 * Write a matrix into Scilab
 * B=[1 4 2 3; 
 *    3 9 8 2 ]
 * Note that it is done column by column
 */ 
double B[] = {1,3,4,9,2,8,3,2};   /* Declare the matrix */
int rowB = 2, colB = 4; /* Size of the matrix */
char variableNameB[] = "B";
SciErr sciErr;

/*
 * Write it into Scilab's memory 
 */
sciErr = createNamedMatrixOfDouble(pvApiCtx,variableNameB,rowB,colB, B); /* pvApiCtx is a global variable */
if(sciErr.iErr)
{
    printError(&sciErr, 0);
}

/*
 * Prior to Scilab 5.2:
 * C2F(cwritemat)(variableNameB, &rowB, &colB, B, strlen(variableNameB));
*/

printf("\n");
printf("Display from Scilab of B:\n");
SendScilabJob("disp(B);"); /* Display B */

/* Read the previously declared matrix of double B */
int rowB_ = 0, colB_ = 0, lp_ = 0;
double *matrixOfDoubleB = NULL;
int i = 0, j = 0;
char variableToBeRetrievedB[] = "B";
SciErr sciErr;

/* First, retrieve the size of the matrix */
sciErr = readNamedMatrixOfDouble(pvApiCtx, variableToBeRetrievedB, &rowB_, &colB_, NULL);
if(sciErr.iErr)
{
    printError(&sciErr, 0);
}

/* 
 * Prior to Scilab 5.2:
 * C2F(cmatptr)(variableToBeRetrievedB, &rowB_, &colB_, &lp_, strlen(variableToBeRetrievedB));
 */

/* Alloc the memory */
matrixOfDoubleB = (double*)malloc((rowB_*colB_)*sizeof(double));

/* Load the matrix */
sciErr = readNamedMatrixOfDouble(pvApiCtx, variableToBeRetrievedB, &rowB_, &colB_, matrixOfDoubleB);
if(sciErr.iErr)
{
    printError(&sciErr, 0);
}

/* 
 * Prior to Scilab 5.2:
 * C2F(creadmat)(variableToBeRetrievedB,&rowB_,&colB_,matrixOfDoubleB,strlen(variableToBeRetrievedB) );
 */

printf("\n");
printf("Display from B formated (size: %d, %d):\n",rowB_, colB_);
for(j = 0 ; j < rowB_ ; j++)
 {
  for(i = 0 ; i < colB_ ; i++)
   {
    /* Display the formated matrix ... the way the user
     * expect */
    printf("%5.2f ",matrixOfDoubleB[i * rowB_ + j]);
   }
  printf("\n"); /* New row of the matrix */
 }