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| Purpose |
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Change the sense of a single constraint.
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| Synopsis |
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int QSchange_sense (QSprob p, int rowindex, char sense)
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| Arguments |
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p |
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a handle to an initialized problem. |
rowindex |
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the index of the constraint to be changed. |
sense |
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the new sense of the constraint; the value should be 'E', 'L', or 'G'. |
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| Returns |
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A zero value if the function terminated correctly, and a non-zero value if an error occurred.
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| Description |
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The sense of each constraint in an LP problem is either ≥ , = , or ≤ . This function can be used to change the sense of a single constraint by specifying a new value using the encoding 'E' for ≥ , 'L' for = , and 'G' for ≤ .
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| Example |
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/* Assume p is initialized to the problem in the QSload_prob example. */
/* Change the second constraint to "<=". */
int rval;
rval = QSchange_sense (p, 1, 'L');
if (rval) {
fprintf (stderr,
"Could not change the sense, error code %d\n",rval);
}
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