first re-commit.

pigpio-master/EXAMPLES/CPP/WIEGAND_CODE/test_wiegand.cpp

@@ -0,0 +1,40 @@
+#include <iostream>
+
+#include <pigpio.h>
+
+#include "wiegand.hpp"
+
+/*
+
+REQUIRES
+
+Wiegand contacts 0 and 1 connected to separate gpios.
+
+TO BUILD
+
+g++ -o wiegand_cpp test_wiegand.cpp wiegand.cpp -lpigpio -lrt
+
+TO RUN
+
+sudo ./wiegand_cpp
+
+*/
+
+void callback(int bits, uint32_t value)
+{
+   std::cout << "bits=" << bits << " value=" << value << std::endl;
+}
+
+int main(int argc, char *argv[])
+{
+   if (gpioInitialise() < 0) return 1;
+
+   Wiegand dec(14, 15, callback);
+
+   sleep(300);
+
+   dec.cancel();
+
+   gpioTerminate();
+}
+