原题:
Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.
Example 1:
Input: "Hello"
Output: "hello"
Example 2:
Input: "here"
Output: "here"
Example 3:
Input: "LOVELY"
Output: "lovely"
思路:
大变小,+32;
小变大,-32.
c++代码实现:
class Solution { public: string toLowerCase(string str) { for(int i=0;i<str.size();i++) { if(str[i]>='A' && str[i]<='Z') str[i]=str[i]+32; } return str; } };
python代码实现:
class Solution(object): def toLowerCase(self, str): str=str.lower() return str