Fixing some format sequences to get rid of warnings

ex8.c

@@ -10,10 +10,10 @@ int main(int argc, char *argv[])
         'S', 'h', 'a', 'w', '\0'
     };
 
-    printf("The size of an int: %d\n", sizeof(int));
+    printf("The size of an int: %ld\n", sizeof(int));
-    printf("The size of areas (int[]): %d\n",
+    printf("The size of areas (int[]): %ld\n",
             sizeof(areas));
-    printf("The number of ints in areas: %d\n",
+    printf("The number of ints in areas: %ld\n",
             sizeof(areas) / sizeof(int));
     printf("The first area is %d, then 2nd %d.\n",
             areas[0], areas[1]);
@@ -22,15 +22,15 @@ int main(int argc, char *argv[])
     printf("Now the first area is %d and the 3rd area is %d.\n",
             areas[0], areas[2]);
 
-    printf("The size of char: %d\n", sizeof(char));
+    printf("The size of char: %ld\n", sizeof(char));
-    printf("The size of name (char[]): %d\n",
+    printf("The size of name (char[]): %ld\n",
             sizeof(name));
-    printf("The number of chars: %d\n",
+    printf("The number of chars: %ld\n",
             sizeof(name) / sizeof(char));
 
-    printf("The size of full_name (char[]): %d\n",
+    printf("The size of full_name (char[]): %ld\n",
             sizeof(full_name));
-    printf("The number of chars: %d\n",
+    printf("The number of chars: %ld\n",
             sizeof(full_name) / sizeof(char));
 
     printf("name=\"%s\" and full_name=\"%s\"\n",