题解 | #二分查找-I#

class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param nums int整型vector 
     * @param target int整型 
     * @return int整型
     */
    int search(vector<int>& nums, int target) {
        // write code here
        int left = 0;
        int right = nums.size()-1;
        int mid;
        while(left<=right)
        {
            mid = left+((right-left)>>1);
            if(target>nums[mid])
            {
                left = mid+1;
            }
            else if(target<nums[mid])
            {
                right = mid-1;
            }
            else 
            {
                return mid;            
            }   
        }
        return -1;
    }
};