XPRBgetnextterm
XPRBgetnextterm |
Purpose
Synopsis
const void *XPRBgetnextterm(XPRBctr ctr, const void *ref, XPRBvar *var, double *coeff);
Arguments
|
ctr
|
Constraint whose terms are to be enumerated.
|
|
ref
|
Reference pointer or
NULL.
|
|
var
|
BCL reference to a variable. May be
NULL if not required.
|
|
coeff
|
Coefficient associated to variable
var. May be
NULL if not required.
|
Return value
Reference pointer for the next call to
XPRBgetnextterm or
NULL if there are no more terms.
Example
XPRBprob prob;
XPRBctr ctr;
XPRBvar var;
double coeff;
const void *ref;
...
ref = NULL;
while ((ref = XPRBgetnextterm(ctr, ref, &var, &coeff)) != NULL) {
XPRBprintf("Variable %s has coefficient %g\n",
XPRBgetvarname(var), coeff);
}
This code extract prints all linear terms of a constraint.
Further information
This function can be used to enumerate the linear terms of a constraint. The second parameter serves to keep track of current location in the enumeration; if this parameter is
NULL, the first term is returned. This function returns
NULL if it is called with the reference to the last element. Otherwise, the returned value can be used as the input parameter
ref to retrieve the following term of the same type. Note that the constant term of the constraint is not included in this enumeration (it can be retrieved with
XPRBgetcoeff)
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