--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/progs/cpp/teststrings.cpp	Thu Apr 28 11:13:09 2016 +0100
@@ -0,0 +1,83 @@
+//============================================================================
+// Name        : teststrings.cpp
+// Author      : Lasse Nielson
+//
+// Description : Generation of Test Strings for Regular Expressions
+//
+// Compile     : g++ -o teststrings teststrings.cpp
+//============================================================================
+
+#include <iostream>
+#include <string>
+#include <sstream>
+
+using namespace std;
+
+string str_email(int n) {
+	stringstream ss;
+	for (int i = 0; i < n; ++i) {
+		for (int j = 0; j < i % 27 + 3; ++j)
+			ss << (char) ('a' + (j % 26));
+		if (n > i + 1)
+			ss << "-";
+	}
+	ss << "@";
+	for (int j = 0; j < 2; ++j) {
+		for (int i = 0; i < n + 3; ++i)
+			ss << (char) ('a' + ((i + j) % 26));
+		ss << ".";
+	}
+	ss << "com";
+	return ss.str();
+}
+
+string str_amount(int n) {
+	stringstream ss;
+	ss << "$";
+	for (int i = 0; i < n; ++i) {
+		ss << (1 + i) % 10;
+		if (n > i + 1 && (n - i) % 3 == 1)
+			ss << ",";
+	}
+	ss << ".53";
+	return ss.str();
+}
+
+string str_float(int n) {
+	stringstream ss;
+	ss << "-";
+	for (int i = 0; i < n; ++i) {
+		ss << (1 + i) % 10;
+	}
+	ss << ".";
+	for (int i = 0; i < n; ++i) {
+		ss << (1 + i) % 10;
+	}
+	ss << "E+";
+	for (int i = 0; i < n; ++i) {
+		ss << (1 + i) % 10;
+	}
+	return ss.str();
+}
+
+int main() {
+    
+        int fin = 10;
+
+	// emails 
+        for (int i = 1; i < fin; i++) {
+          cout << str_email(i) << endl;
+        }
+
+        // dollar amounts
+        for (int i = 1; i < fin; i++) {
+	  cout << str_amount(i) << endl;
+        }
+
+        // float numbers
+        for (int i = 1; i < fin; i++) {
+	  cout << str_float(i) << endl;
+        }
+
+	return 0;
+}