ModSim: added growth output to assisgnment 2.7.

modsim/ass2/q7.c

@@ -4,11 +4,9 @@
 void sequence(int n, int max_age) {
     int i;
 
-    long long mature = 0,
-         died = 0;
-
-    long long *born = malloc((n+1) * sizeof(long long));
-    printf("size: %d\n", sizeof(long long));
+    long long mature = 0, died = 0, pop_new, pop_old = 1,
+              *born = malloc((n + 1) * sizeof(long long)),
+              *diff = malloc((n + 1) * sizeof(long long));
 
     printf("popu:");
 
@@ -19,21 +17,22 @@ void sequence(int n, int max_age) {
         died = i < max_age ? 0 : born[i - max_age];
         born[i] = mature;
         mature = mature + born[i - 1] - died;
-
-        printf(" %lld", mature + born[i]);
+        printf(" %lld", pop_new = mature + born[i]);
+        diff[i] = pop_new - pop_old;
+        pop_old = pop_new;
     }
-    born[i] = mature;
 
     puts("");
 
     printf("diff:  ");
 
     for( i = 1; i < n; i++ )
-        printf(" %lld", born[i]);
+        printf(" %lld", diff[i]);
 
     puts("");
 
     free(born);
+    free(diff);
 }
 
 int main(int argc, char *argv[]) {