Adding back in some comments for line number matchiness

ex7.c

@@ -20,7 +20,7 @@ int main(int argc, char *argv[])
     printf("That is only a %e portion of the universe.\n",
             part_of_universe);
 
-
+    // this makes no sense, just a demo of something weird
     char nul_byte = '\0';
     int care_percentage = bugs * nul_byte;
     printf("Which means you should care %d%%.\n",

ex8.c

@@ -10,6 +10,8 @@ int main(int argc, char *argv[])
         'S', 'h', 'a', 'w', '\0'
     };
 
+    // WARNING: On some systems you may have to change the
+    // %ld in this code to a %u since it will use unsigned ints
     printf("The size of an int: %ld\n", sizeof(int));
     printf("The size of areas (int[]): %ld\n",
             sizeof(areas));