42 FILE *rng;  variable
49    size = 1 + ((fgetc(rng)<<8) + fgetc(rng)) % 101;  in rand_num()
50    buf[0] = (fgetc(rng)&1)?1:0;  in rand_num()
51    fread(buf+1, 1, size, rng);  in rand_num()
52    while (buf[1] == 0) buf[1] = fgetc(rng);  in rand_num()
61    size = 10 + ((fgetc(rng)<<8) + fgetc(rng)) % 101;  in rand_num2()
62    buf[0] = (fgetc(rng)&1)?1:0;  in rand_num2()
63    fread(buf+1, 1, size, rng);  in rand_num2()
64    while (buf[1] == 0) buf[1] = fgetc(rng);  in rand_num2()
101    rng = fopen("/dev/urandom", "rb");  in main()
102    if (rng == NULL) {  in main()
103       rng = fopen("/dev/random", "rb");  in main()
104       if (rng == NULL) {  in main()
106          rng = stdin;  in main()
118        n = fgetc(rng) % 15;  in main()
183       n = fgetc(rng) & 63;  in main()
195       n = fgetc(rng) & 63;  in main()
302    fclose(rng);  in main()