剑指Offer39 数组中寻找和为sum的两个数字

 1 /*************************************************************************
 2     > File Name: 39_TwoNumbersWithSum.cpp
 3     > Author: Juntaran
 4     > Mail: JuntaranMail@gmail.com
 5     > Created Time: 2016年09月03日 星期六 11时14分49秒
 6  ************************************************************************/
 7 
 8 #include <stdio.h>
 9 
10 bool FindNumberWithSum(int* nums, int length, int sum, int* num1, int* num2)
11 {
12     bool ret = false;
13     if (length<1 || num1==NULL || num2==NULL)
14         return ret;
15     
16     int left  = 0;
17     int right = length - 1;
18     
19     while (right > left)
20     {
21         int current = nums[left] + nums[right];
22         if (current == sum)
23         {
24             *num1 = nums[left];
25             *num2 = nums[right];
26             ret = true;
27             return ret;
28         }
29         else if (current > sum)
30             right --;
31         else
32             left ++;
33     }
34     return ret;
35 }
36 
37 int main()
38 {
39     int nums[] = {1,2,4,7,11,15};
40     int length = 6;
41     int sum = 15;
42     int num1, num2;
43     
44     if (FindNumberWithSum(nums, length, sum, &num1, &num2))
45         printf("%d, %d\n", num1, num2);
46     else
47         printf("Not Find\n");
48     return 0;
49 }