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- /* LISTING 3 - OBJ.C */
-
- #include <stdio.h>
- #include "obj.h"
-
- #define SETCOLOR 0
- #define GETCOLOR 1
-
- extern CIRCLE_ACTIONS cact;
-
- main()
- {
- int col;
-
- /* create CIRCLE c */
- CIRCLE c = { 14, &cact };
-
- /* use GETCOLOR message to get c's color */
- col = (*(c1.pcact->pactions[GETCOLOR]))(&c1);
- printf("c1 is color %d\n", col);
-
-
- /* use SETCOLOR message to set new color */
- (*(c1.pcact->pactions[SETCOLOR]))(&c1, 7);
-
-
- /* get the new color */
- col = (*(c1.pcact->pactions[GETCOLOR]))(&c1);
- printf("c1 is now color %d\n", col);
- }
-
-