[LeetCode] To Lower Case 转为小写

Posted 2021-01-22 Grandyang

 

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"

 

这道题让我们将单词转为小写，是一道比较简单的题目，我们都知道小写字母比其对应的大写字母的ASCII码大32，所以我们只需要遍历字符串，对于所有的大写字母，统统加上32即可，参见代码如下：

 

class Solution {
public:
    string toLowerCase(string str) {
        for (char &c : str) {
            if (c >= \'A\' && c <= \'Z\') c += 32;
        }
        return str;
    }
};

 

参考资料：

https://leetcode.com/problems/to-lower-case/

 

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