1extern int getch();
2extern int class();
3
4int
5token()
6{
7    int state = 1;
8
9    while (1) {
10	int c=0;
11	c = getch();
12	switch (state) {
13	case 1: break;
14	case 4: break;
15	case 5: break;
16	case 6:
17            {
18	        switch (class(c)) {
19	        default: break;
20	        }
21	    } break;
22	case 7:	break;
23	}
24    }
25}
26
27