nit

vm-intro/va.c

@@ -3,7 +3,7 @@
 
 int main(int argc, char *argv[]) {
     printf("location of code : %p\n", main);
-    printf("location of heap : %p\n", malloc(100000000));
+    printf("location of heap : %p\n", malloc(100e6));
     int x = 3;
     printf("location of stack: %p\n", &x);
     return 0;