Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.html
Example 1:spa
Input: "Hello"
Output: "hello"
Example 2:code
Input: "here"
Output: "here"
Example 3:htm
Input: "LOVELY"
Output: "lovely"
這道題讓咱們將單詞轉爲小寫,是一道比較簡單的題目,咱們都知道小寫字母比其對應的大寫字母的ASCII碼大32,因此咱們只須要遍歷字符串,對於全部的大寫字母,通通加上32便可,參見代碼以下:blog
class Solution { public: string toLowerCase(string str) { for (char &c : str) { if (c >= 'A' && c <= 'Z') c += 32; } return str; } };
參考資料:leetcode
https://leetcode.com/problems/to-lower-case/字符串