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