style changes for pthread example

Author: huichen-cs

memory/linux/pagetable/Readme.md

@@ -1,3 +1,7 @@
-# Reference
+# Experiment
+
+Run `countframes` and `pagetable` as root.
+
+## Reference
 
 [vvar] memory region, <https://lwn.net/Articles/615809/>

thread/pthread/sumall/part_sum.c

@@ -1,6 +1,7 @@
 #include <pthread.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 
 #include "part_sum.h"

thread/pthread/sumall/sum_main.c

@@ -2,8 +2,10 @@
 #include <pthread.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <time.h>
+#include <inttypes.h>
 
 #include "part_sum.h"
 #include "util.h"