remove_if 用法示例

#include <stdio.h>
#include <vector>
#include <string>
#include <algorithm>
#include <iostream>

using namespace std;

class not_contain {
    private:
        string key;

    public:
        not_contain (string k)
        {
            key = k;
        }

        bool  operator()(const string &x) const
        {
            return x.find(key) == string::npos && x.find(key) == string::npos;
        }

};

int main(int argc, char* argv[])
{
    vector<string> a;

    a.push_back("a");
    a.push_back("ab");
    a.push_back("de");
    a.push_back("ea");
    a.push_back("bb");

    vector<string>::iterator it;
    size_t i = 0;

    /*
    for(it = a.begin(); it != a.end(); it++)
        cout << (*it)<<endl;
    cout<<endl;
    */
    for(; i < a.size(); i++)
    {
        string &s = a[i];
        printf("i = %ld\t%s\n", i, s.c_str());
    }

    vector<string>::iterator last = remove_if(a.begin(), a.end(), not_contain("a"));
    printf("\nelements before last:\n");
    for(it = a.begin(); it != last; it++)
        cout<<(*it)<<endl;

    a.erase(last, a.end());

    printf("\nelements after erase:\n");
    for(i = 0; i < a.size(); i++)
    {
        string &s = a[i];
        printf("i = %ld\t%s\n", i, s.c_str());
    }
    printf("\n");

    return 0;
};