小编Mak*_*aPr的帖子

I want to make my vector, vector_list, not to have any duplicate data. Here the code:

int is_Tally(int num ) 
{
    vector<int> vector_list;
    for(int i=1; i< 1000;i++)
    {
        int item = (i*num)%10000;
        if (vector_list.empty())
        {
            vector_list.push_back(item);
        }
        else
        {
            if (find(vector_list.begin(), vector_list.end(), item)!=vector_list.end())
            {
                vector_list.push_back(item);
                if (vector_list.size()>15)
                {
                    return 0;
                }
            }
        } 
    }
    return vector_list.size();

And I got an error when I execute the code.

error: no matching function for call to 'find(__gnu_cxx::__normal_iterator<int*,     std::vector<int, std::allocator<int> > >, __gnu_cxx::__normal_iterator<int*, std::vector<int, …

如何在C++中访问字符串索引？例如:如果我有字符串变量名称测试,我想从索引号5到9访问它.我怎么能用C++做到这一点？

string test;
cout<<test[5:9];

我尝试了上面的方法,但它不起作用.有什么建议？谢谢.

<?php 
     require_once 'database.php';
class User {
public $id;
public $username;
public $first_name;
public $last_name;
public $password;
public static function find_by_id($id){
    $result_array = self::find_by_sql("SELECT * FROM users WHERE id = {$id} LIMIT 1");
    return !(empty($result_array))? array_shift($result_array): false;
}
public static function find_by_sql($sql){
    global $database;
    $result = $database->query($sql);
    $object = array();
    while ($row = $database->fetct_array($result)){
     $object[] = self::instantiate($row);  
    }
    return $object;
}
public static function instantiate($record)
        {
    $object = new self;
    foreach($record as $attribute => $value)
        {
        if ($object->has_attribute($attribute)){
            $object->$attribute = $value; …