Automake the data files.

.gitignore

@@ -1,14 +1,25 @@
+# data files
 data/corpus.txt
+data/cpp
+data/ods-cpp.tgz
+
+# autotools junk files
+.deps
+Makefile
 Makefile.in
 aclocal.m4
 autom4te.cache/
 compile
-config.guess
-config.sub
+config.*
 configure
 depcomp
 install-sh
+libtool
 ltmain.sh
 m4/
 missing
-src/Makefile.in
+
+# build artifacts
+src/*.o
+src/ch??ex??
+

Makefile.am

@@ -1,2 +1,2 @@
 ACLOCAL_AMFLAGS =       -I m4
-SUBDIRS =               src
+SUBDIRS =               src data

configure.ac

@@ -9,7 +9,7 @@ AC_INIT([ods],
 AM_INIT_AUTOMAKE([1.11 foreign])
 
 AC_CONFIG_SRCDIR([src/ch01ex01.cc])
-AC_CONFIG_FILES([Makefile src/Makefile])
+AC_CONFIG_FILES([Makefile src/Makefile data/Makefile])
 AC_CONFIG_MACRO_DIR([m4])
 
 PKG_PROG_PKG_CONFIG

data/Makefile.am

@@ -0,0 +1,12 @@
+pkgdata_DATA = corpus.txt ods-cpp/main.cpp
+
+corpus.txt: corpus.txt.gz
+	gzip -d -k $@.gz
+
+ods-cpp/main.cpp: ods-cpp.tgz
+	tar xzf ods-cpp.tgz
+
+ODS_SAMPLE_CODE_URL :=		http://opendatastructures.org/ods-cpp.tgz
+ods-cpp.tgz:
+	if command -v curl 2>&1 > /dev/null ; then curl -L -O $(ODS_SAMPLE_CODE_URL) \
+	elif command -v curl 2>&1 > /dev/null ; then wget $(ODS_SAMPLE_CODE_URL) ; fi

notes/chapter1.txt

@@ -132,6 +132,10 @@ Run times come in three flavours:
    and pop() operations. Show how, using only a FIFO Queue, q, you can
    reverse the order of all elements in s.
 
+   See src/ch01ex04.cc: you just pop each element from the stack → queue,
+   then pop the elements off the queue. If you wanted to reverse the stack
+   itself, you'd just push the elements back onto the stack.
+
 5. Using a USet, implement a Bag. A Bag is like a USet—it supports the add(x),
    remove(x) and find(x) methods—but it allows duplicate elements to be
    stored. The find(x) operation in a Bag returns some element (if any) that
@@ -148,4 +152,4 @@ Run times come in three flavours:
    remove(i) in your List implementation. Think about how you could improve
    the performance of the find(x) operation in your USet and SSet
    implementations. This exercise is designed to give you a feel for how
-   difficult it can be to obtain efficient implementations of these interfaces
+   difficult it can be to obtain efficient implementations of these interfaces

src/Makefile.am

@@ -3,6 +3,7 @@ AM_CPPFLAGS +=  -Wwrite-strings -Wmissing-declarations -Wno-long-long -Werror
 AM_CPPFLAGS +=  -Wunused-variable -std=c++14 -D_XOPEN_SOURCE -O0 -g -I.
 AM_CPPFLAGS +=  -fno-elide-constructors -Weffc++
 
-bin_PROGRAMS :=	ch01ex01 ch01ex03
+bin_PROGRAMS :=	ch01ex01 ch01ex03 ch01ex04
 ch01ex01_SOURCES := ch01ex01.cc
-ch01ex03_SOURCES := ch01ex03.cc
+ch01ex03_SOURCES := ch01ex03.cc
+ch01ex04_SOURCES := ch01ex04.cc

src/ch01ex04.cc

@@ -0,0 +1,43 @@
+#include <iostream>
+#include <queue>
+#include <stack>
+#include <string>
+using namespace std;
+
+
+
+static void
+print_queue(queue<int>& q)
+{
+	while (!q.empty()) {
+		cout << q.front() << " ";
+		q.pop();
+	}
+	cout << endl;
+}
+
+
+int
+main(int argc, char *argv[])
+{
+	stack<int>	s;
+	queue<int>	q;
+
+	for (int i = 1; i < argc; i++) {
+		string	line(argv[i]);
+		int	arg = stoi(line);
+
+		s.push(arg);
+	}
+
+	while (!s.empty()) {
+		// NB: the pop() interface in the book returns the topmost
+		// element while removing it; the C++ STL interface does
+		// not, requiring the separate top() and pop() invocations.
+		int arg = s.top();
+		s.pop();
+		q.push(arg);
+	}
+
+	print_queue(q);
+}

src/ch01ex05.cc

@@ -0,0 +1,15 @@
+#include <iostream>
+#include <vector>
+
+// Using a USet, implement a Bag. A Bag is like a USet supports the add(x),
+// remove(x), and find (x) methods — but it allows duplicate
+// elements to be stored.  The find(x) operation in a Bag returns some element (if any) that is equal to x. In addition,
+// a Bag supports the findAll(x) operation that returns a list of all elements in the Bag that are equal to x.
+
+template<typename T>
+class Bag {
+public:
+
+private:
+	vector<T>	v;
+};