Study results from Stroustrup's PPP3 book.

PPP3/PPP.h

@@ -0,0 +1,29 @@
+// PPPheaders.h
+
+#include<iostream>
+#include <sstream>
+#include<string>
+#include<vector>
+#include<span>
+#include<stdexcept>
+#include<random>
+
+#include<stdint.h>
+#include<list>
+#include <map>
+#include<unordered_map>
+#include <set>
+#include<memory>
+#include <algorithm>
+
+#define PPP_EXPORT
+#include "PPP_support.h"
+
+using namespace std;
+using namespace PPP;
+
+
+// disgusting macro hack to get a range checking:
+#define vector Checked_vector
+#define string Checked_string
+#define span Checked_span