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; } };
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