104 static void send ( char* s )  in send()  function
117   send("in ");  in pre()
118   send(s);  in pre()
119   send("-pre:  fact(");  in pre()
120   send(buf);  in pre()
121   send(")\n");  in pre()
130   send("in ");  in post()
131   send(s);  in post()
132   send("-post: fact(");  in post()
133   send(buf);  in post()
134   send(") = ");  in post()
136   send(buf);  in post()
137   send("\n");  in post()