1/*
2 * Copyright 2011, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <time.h>
20
21int main() {
22  srand(time(NULL));
23
24  unsigned int ans = rand() % 100;
25  unsigned int user = 100;
26  unsigned int left = 0;
27  unsigned int right = 99;
28
29  printf("Hello, droid!  Let's play a number guessing game!\n");
30
31  while (user != ans) {
32    printf("Please input a number [%d-%d]:\n", left, right);
33
34    if (scanf("%u", &user) != 1) {
35      break;
36    }
37
38    if (user < left || user > right) {
39      /* Out of range, ignore this answer. */
40      continue;
41    } else if (user == ans) {
42      printf("You got it!\n");
43      break;
44    } else if (user < ans) {
45      left = user;
46    } else {
47      right = user;
48    }
49  }
50
51  return 0;
52}
53