include files that are used frequently, but
// are changed infrequently
//
#pragma once
#include "targetver.h"
#include <stdio.h>
#include <tchar.h>
// TODO: reference additional headers your program requires here
3. stdafx.cpp
// stdafx.cpp : source file that includes just the standard includes
// MinNumberInRotatedArray.pch will be the pre-compiled header
// stdafx.obj will contain the pre-compiled type information
#include "stdafx.h"
// TODO: reference any additional headers you need in STDAFX.H
// and not in this file
4. MinNumberInRotatedArray.cpp
// MinNumberInRotatedArray.cpp : Defines the entry point for the console application.
//
// 《剑指Offer——名企面试官精讲典型编程题》代码
// 著作权所有者:何海涛
#include "stdafx.h"
#include<exception>
int MinInOrder(int* numbers, int index1, int index2);
int Min(int* numbers, int length)
{
if(numbers == NULL || length <= 0)
throw new std::exception("Invalid parameters");
int index1 = 0;
int index2 = length - 1;
int indexMid = index1;
while(numbers[index1] >= numbers[index2])
{
// 如果index1和index2指向相邻的两个数,
// 则index1指向第一个递增子数组的最后一个数字,
// index2指向第二个子数组的第一个数字,也就是数组中的最小数字
if(index2 - index1 == 1)
{
indexMid = index2;
break;
}
// 如果下标为index1、index2和indexMid指向的三个数字相等,
// 则只能顺序查找
indexMid = (index1 + index2) / 2;
if(numbers[index1] == numbers[index2] && numbers[indexMid] == numbers[index1])
return MinInOrder(numbers, index1, index2);
// 缩小查找范围
if(numbers[indexMid] >= numbers[index1])
index1 = indexMid;
else if(numbers[indexMid] <= numbers[index2])
index2 = indexMid;
}
return numbers[indexMid];
}
int MinInOrder(int* numbers, int index1, int index2)
{
int result = numbers[index1];
for(int i = index1 + 1; i <= index2; ++i)
{
if(result > numbers[i])
result = numbers[i];
}
return result;
}
// ====================测试代码====================
void Test(int* numbers, int length, int expected)
{
int result = 0;
try
{
result = Min(numbers, length);
for(int i = 0; i < length; ++i)
printf("%d ", numbers[i]);
if(result == expected)
printf("\tpassed\n");
else
printf("\tfailed\n");
}
catch (...)
{
if(numbers == NULL)
printf("Test passed