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/* Change the objective coefficient of variable y to 5.0 */
int rval = 0;
int yindex;
/* Find the index of of y */
rval = QSget_column_index (p, "y", &yindex);
if (rval) {
fprintf (stderr, "could not get index, error code %d\n", rval);
} else {
if (yindex == -1) {
printf ("y is not a variable in the problem\n");
} else {
rval = QSchange_objcoef (p, yindex, 5.0);
if (rval) {
fprintf (stderr, "could not change coef, error %d\n", rval);
}
}
}
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