ModSim: Minor bug fix in assignment 2.7

modsim/ass2/Makefile

@@ -10,6 +10,7 @@ q%: q%.o
 %.o: %.c
 	$(CC) $(CFLAGS) -o $@ -c $^
 
+.PHONY: clean
 clean:
 	for i in `seq 7`; do \
 		rm -vf q$$i; \

modsim/ass2/q7.c

@@ -7,7 +7,7 @@
 #include <assert.h>
 
 typedef struct rabbit {
-    int age;
+    unsigned short age;
     struct rabbit *prev, *next;
 } rabbit;
 
@@ -38,7 +38,7 @@ void rabbit_die(rabbit **ptr) {
         r->next->prev = r->prev;
 
     if( r == rabbits )
-        rabbits = NULL;
+        rabbits = r->next;
 
     *ptr = NULL;
     rabbit_count--;
@@ -69,7 +69,6 @@ void sequence(int generations, int max_age) {
 
     puts("");
 
-    // This does not free() all rabbits
     while( rabbits )
         rabbit_die(&rabbits);
 }