Given two strings s and t, write a function to determine if t is an anagram of s.
For example,
s = "anagram", t = "nagaram", return true.
s = "rat", t = "car", return false.
Note:
You may assume the string contains only lowercase alphabets.
实现:
class Solution {
public:
    bool isAnagram(string s, string t) {
        if (s.size() != t.size()) return false;
        int bit[26] = {0}, len = s.length();
    
        for(int i=0; i<len; i++)
            bit[s[i]-‘a‘]++;
    
        for(int i=0; i<len; i++)
            if(--bit[t[i]-‘a‘] < 0)
                return false;
        return true;
    }
};
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原文地址:http://blog.csdn.net/booirror/article/details/47211621