c++谓词找出大于5的数

Question

//麻烦大家看看,这个报错怎么改
[Error] no matching function for call to 'GreaterFive::GreaterFive(int&)'

#include<iostream>
using namespace std;

const int L = 10;
#include<vector>
#include<algorithm>
class MyPrint
{
public:
    void operator()(int value)
    {
        cout << value << " ";
    }
};

class MyCompare
{
public:
    bool operator()(int value1,int value2)
    {
        return value1 > value2;
    }
};

class GreaterFive
{
public:
    bool operator()(int value)
    {
        return value >5;
    }
};

void greaterFive(vector<int>v)
{    
    int i=0;
    int indexs[L];
    for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
    {
        int ret = GreaterFive(*it);
        if (ret==1)
        {
            indexs[i] = std::distance(v.begin(), it);
                i++;
        }

    }
    cout << "结果如下" << endl;
    for (int i = 0; i < sizeof(indexs) / 4; i++)
    {
        cout << indexs[i] << " ";
    }
    cout << endl;
    
}
int main()
{
    vector<int>v;
    for (int i = 0; i < 5; i++)
    {
        int x = rand() % 100 + 1;
        v.push_back(x);
    }
    cout << "排序前" << endl;
    for_each(v.begin(), v.end(), MyPrint()); cout << endl;

    cout << "升序排序后" << endl;
    sort(v.begin(), v.end());
    for_each(v.begin(), v.end(), MyPrint()); cout << endl;

    cout << "降序排序后" << endl;
    sort(v.begin(), v.end(), MyCompare());
    for_each(v.begin(), v.end(), MyPrint()); cout << endl;

    greaterFive(v);
}

Answer 1

GreaterFive没有这个函数 你这只有一个同名的类