Page:4SIGHT manual- a computer program for modelling degradation of underground low level waste concrete vaults (IA 4sightmanualcomp5612snyd).pdf/101

22. Interrupt handlers.

The following routines handle ctrl-brk and math exceptions. The routine ctrlbrk requires dos.h.

The routine signal requires signal. h.

⟨Include files 3⟩ $\equiv$
#include <dos.h>
#include <signal.h>

23.

⟨Function declarations 23⟩ $\equiv$
 int control-break ( oid);
 int matherr (struct exception *);
 void div_0(void);

See also sections 33, 39, 43, 51, 54, 56, 59, 60, 61, and 65.

This code is used in section 2.

24. control-break handles interruptions due to the use striking CTRL-BRK during execution.

⟨Interrupt handlers 24⟩ 
 int control-break (void) {
   int  i, j, k ;
   printf("\n\n\tUSER CTRL-BRK!.\n\n); ⟨Print desired output 78⟩1
   return 0; }

See also sections 25 and 26.

This code is used in section 2.

25. The routine matherr handles exceptions from the math coprocessor.

⟨Interrupt handlers 24⟩ \$+\equiv$
 int matherr (struct exception *c)
 {
   printf/("\n\n");
   printf("tmatherr: ");
   switch (e-type) {
   case DOMAIN: printf( "DOMAIN");
     break;
   case SING: printf( "SINGULARITY");
     break;
   case OVERFLOW: printf("0VERFL0W");
     break;
   case UNDERFLOW: printf("UNDERFLOW");
     break;
   case TLOSS: printf("TL0SS");
     break;
   default: printf("UNKN0WN ERR0R TYPE!");
     break;
   }
   printf("\n");
   printf("\n\n\t");
   printf("function:\t%,s(%lf,%lf)\n", e-name e-arg1 e-arg2);
   printf("\n");
   exit(O);
 }