This paper describes a system for generating an executable C++ program from object-oriented design diagrams. Especially an event-trace diagram and a decision table are used to describe an operational definition. The decision table offers a high-level language LOLA for the brief expression of controls that are dependent on the data structure. This language allows the methods to be expressed easily, briefly, and visually. A C++ program was generated from these diagrams in such a way that the part clich?s are edited to satisfy LOLA expression and embedded into the frame clich? representing the skeleton of the whole program.