Callbacks
It is good practice to set up at least a message callback, so that any messages produced by the system appear on the screen or in a file. The XSLPsetcbmessage function sets both the Xpress NonLinear and Xpress Optimizer callbacks, so that all messages appear in the same place.
| XSLPsetcbmessage(sprob, XSLPMessage, NULL); |
void XPRS_CC XSLPMessage(XSLPprob my_prob, void *my_object, char *msg, int len,
int msg_type)
{
switch (msg_type) {
case 4: /* error */
case 3: /* warning */
case 2: /* dialogue */
case 1: /* information */
printf("%s\n", msg);
break;
default: /* exiting */
fflush(stdout);
break;
}
} This is a simple callback routine, which prints any message to standard output.
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