3 void yyerror (char const *);
15 } st; /* subtree type */
18 struct tree* c; /* condition */
19 struct tree* i; /* if */
20 struct tree* e; /* else */
27 } cond; /* binary operator */
66 struct tree* input_tree;
69 void* xmalloc(size_t size);
70 char* xstrdup(char* s);
74 void print_tree(struct tree* t, int ind);
75 void interp(struct tree* t);