c++ - 我在具有 equal_range 的字符串 vector 中找到所有包含五个字母的单词，并且它不断抛出一个错误，说它没有排序

Question

void Iterator::displayStringFour(const vector<string> &v)
{
    vector<string>tempVect(v.size());
    tempVect = v;
    int smallest;

    sort(tempVect.begin(), tempVect.end(), Equal());

In the line above I sort the vector in order of least chars in a string to greatest.

    pair<vector<string>::iterator,vector<string>::iterator> equalRange;

*this next line is where it throws an error saying that the set isnt sorted. i have used a functor object to sort in in order of least chars to greatest and i am not sure how else it would like for me to sort the vector *

    equalRange = equal_range(tempVect.begin(),tempVect.end(),"-----");
    vector<string>::iterator range = equalRange.first;

    while(range!=equalRange.second)
    {
        cout<<*range;
        ++range;
    }
}

This is my functor object that takes two strings and sorts the vector

class Equal
{
public:
    bool operator()(string a,string b)
    {
        return a.length()<b.length();
    }
};

Answer 1

将 Equal() 作为第四个参数传递给 equal_range，否则它将使用默认的比较仿函数，即“less”。