1 #include <stdlib.h> 2 #include <stdio.h> 3 #include <string.h> 4  5 #define ARRAY_SIZE 10 6  7 int binarySearch(int *arr, int size, int target) 8 {  9     int low = 0;10     int high = size - 1;11     while (low < high)12     {13         int mid = low + (high - low) / 2;14         //当low+high超过整数范围会发生溢出，变为负数15         //int mid = (low + high) / 2; 16         if (arr[mid] < target)17         {18             low = mid + 1;19         } 20         else if (arr[mid] > target)21         {22             high = mid - 1;23         }24         else25         {26             return mid;27         }28     }29     return -1;30 }31 int main(int argc, char **argv)32 {33     int array_unsort[ARRAY_SIZE] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};34     int pos = binarySearch(array_unsort, ARRAY_SIZE, 6);35     printf("The target is in pos = %d\n", pos);36     getchar();37     return 0;38 39 }