From 8d78c7c6384da8b0bade19f782509db94c4ca792 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Tue, 22 Apr 2025 09:54:23 -0700
Subject: More help for block layout

---
 chapter22/README.md | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

(limited to 'chapter22')

diff --git a/chapter22/README.md b/chapter22/README.md
index 63cd12bf..570490f8 100644
--- a/chapter22/README.md
+++ b/chapter22/README.md
@@ -1,4 +1,4 @@
-# Chapter 22: Strings and Such
+# Chapter 22: Strings and I/O
 
 It's high time for Strings and printing!  In this chapter we look at what it
 takes to make a nice user-mode string.  We are implementing strings in the base
@@ -46,11 +46,11 @@ Any number of named fields are allowed:
 
 ```java
 struct Class {
-    str className;
-    str professor;
-    int time;
-    int credits;
-    Class prerequisiste;
+    str     className;
+    str     professor;
+    int     time;
+    int     credits;
+    Class   prerequisite;
     u16     #; // Limit of 65535 students per class
     Student [];
 };
@@ -135,4 +135,24 @@ chapter.
 
 ## A String Implementation
 
+### A Final String
+
+### A Extendable String (aka StringBuilder or StringBuffer)
+
+```java
+struct xstr {
+// update-in-place expanding string
+
+};
+```
+
+
 ## FFI and I/O Calls
+
+Calling external / FFI functions.
+
+`{ i32 fd, u8[] buf, i32 len -> i32 } write = "C";`
+
+
+## Importing name spaces
+
-- 
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