第二道编程题是，判断两个字符串拼接形式是否相等

#include <iostream>
using namespace std;

bool func(const string &s, const string &t)
{
    if (s.empty() && t.empty())
    {
        return true;
    }
    if (s.size() != t.size())
    {
        return false;
    }

    unsigned int s_count[256] = {0};
    unsigned int t_count[256] = {0};

    for (int i=0; i<s.size(); i++)
    {
        ++s_count[s[i]];
        ++t_count[t[i]];
        if (s_count[s[i]] != t_count[t[i]])
        {
            return false;
        }
    }
    return true;
}

void main()
{
    string s = "book";
    string t = "look";
    cout<<func(s , t)<<endl;
    system("pause");
    return;
}