meson and C++ files as *.cpp

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

account.cpp

@@ -0,0 +1,12 @@
+#include <iostream>
+#include <cmath>
+#include <cstdlib>
+
+using namespace std;
+
+#include "account.h"
+
+int main(int argc, char* argv[]) {
+	Account	account(0.0);
+	return EXIT_SUCCESS;
+}