Add missing test file

tests/testdata/cpp/simple/printer.cpp

@@ -0,0 +1,21 @@
+#include <array>
+#include <iostream>
+
+int main( int argc, char** argv )
+{
+  if ( ( argc - 1 ) % 2 )
+  {
+    std::cerr << "Unbalanced arguments\n";
+    return 1;
+  }
+
+  for ( int i=1; i < argc; i += 2 )
+  {
+    std::cout << argv[ i ]
+              << ": "
+              << argv[ i + 1 ]
+              << '\n';
+  }
+
+  return 0;
+}