ex22 and a smidge of the easiest extra credit :P

lcthw-remnants-2/Makefile

@@ -7,6 +7,8 @@ all: $(EXERCISES)
 
 ex19: object.o
 
+ex22_main: ex22.o
+
 clean:
 	shopt -s nullglob ; \
 	$(RM) $(EXERCISES) *.o *.a

lcthw-remnants-2/ex22.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include "ex22.h"
+#include "dbg.h"
+
+int THE_SIZE = 1000;
+
+static int THE_AGE = 37;
+
+int get_age()
+{
+  return THE_AGE;
+}
+
+void set_age(int age)
+{
+  THE_AGE = age;
+}
+
+
+double update_ratio(double new_ratio)
+{
+  static double ratio = 1.0;
+
+  double old_ratio = ratio;
+  ratio = new_ratio;
+
+  return old_ratio;
+}
+
+void print_size()
+{
+  log_info("I think size is: %d", THE_SIZE);
+}

lcthw-remnants-2/ex22_main.c

@@ -0,0 +1,54 @@
+#include "ex22.h"
+#include "dbg.h"
+
+const char *MY_NAME = "Zed A. Shaw";
+
+void scope_demo(int count)
+{
+  log_info("count is: %d", count);
+
+  if(count > 10) {
+    int count = 100;  // BAD! BUGS!
+
+    log_info("count in this scope is %d", count);
+  }
+
+  log_info("count is at exit: %d", count);
+
+  count = 3000;
+
+  log_info("count after assign: %d", count);
+}
+
+int main(int argc, char *argv[])
+{
+  // test out THE_AGE accessors
+  log_info("My name: %s, age: %d", MY_NAME, get_age());
+
+  set_age(100);
+
+  log_info("My age is now: %d", get_age());
+
+  // test out THE_SIZE extern
+  log_info("THE_SIZE is: %d", THE_SIZE);
+  print_size();
+
+  THE_SIZE = 9;
+
+  log_info("THE_SIZE is now: %d", THE_SIZE);
+  print_size();
+
+  // test the ration function static
+  log_info("Ratio at first: %f", update_ratio(2.0));
+  log_info("Ratio again: %f", update_ratio(10.0));
+  log_info("Ratio once more: %f", update_ratio(300.0));
+
+  // test the scope demo
+  int count = 4;
+  scope_demo(count);
+  scope_demo(count * 20);
+
+  log_info("count after calling scope_demo: %d", count);
+
+  return 0;
+}