LeetCode-709. To Lower Case

LeetCode-709. To Lower Case

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"

题解：

class Solution {public: string toLowerCase(string str) { int n = str.size(); if (n == 0) { return str; } for (int i = 0; i < n; i++) { if (str[i] >= 'A' && str[i] <= 'Z') { str[i] += 32; } } return str; }};

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