Get the column number for a variable.

Column number (non-negative value), or a negative value.

XPRBprob expl2;
XPRBvar x1;
int vindex;
   ...
expl2 = XPRBnewprob("example2");
x1 = XPRBnewvar(expl2, XPRB_UI, "abc3", 0, 100);
vindex = XPRBgetcolnum(x1);

This gets the column number for variable x1.

This function returns the column number of a variable in the matrix currently loaded in the Xpress Optimizer. If the variable is not part of the matrix, or if the matrix has not yet been generated, the function returns a negative value. To check whether the matrix has been generated, use function XPRBgetprobstat. The counting of column numbers starts with 0.

XPRBgetvarname, XPRBgetvartype.