小编jit*_*dra的帖子

档案1 - /Users/jitendraojha/www/DesignPatternsWithPhpLanguage/FactoryPattern/FactoryClassPattern/UserInterface.php

<?php

namespace DesignPatternsWithPhpLanguage\FactoryPattern\FactoryClassPattern;

interface UserInterface
{

    function setFirstName($firstName);
    function getFirstName();
}

?>

档案2 - /Users/jitendraojha/www/DesignPatternsWithPhpLanguage/FactoryPattern/FactoryClassPattern/User.php

<?php

namespace DesignPatternsWithPhpLanguage\FactoryPattern\FactoryClassPattern;


class User implements UserInterface
{

    private $firstName = null;

    public function __construct($params) {   }

    public function setFirstName($firstName)
    {

        $this->firstName = $firstName;
    }

    public function getFirstName()
    {

        return $this->firstName;
    }
}

?>

问题

php FactoryPattern/FactoryClassPattern/UserInterface.php - 运行正常.

php FactoryPattern/FactoryClassPattern/User.php- 给出以下错误:PHP致命错误:在第7行的/Users/jitendraojha/www/DesignPatternsWithPhpLanguage/FactoryPattern/FactoryClassPattern/User.php中找不到接口'DesignPatternsWithPhpLanguage\FactoryPattern\FactoryClassPattern\UserInterface'

我use UserInterface;在文件2中添加了没有解决方案.

在算法设计手册（第16页）一书中，讨论了以下增量算法的正确性的归纳证明。

Increment(y)
    if (y == 0) return 1;
    else if (y % 2 == 1) return 2 * Increment(floor(y/2));
    else return y + 1;

但我在讨论中的某一点（或假设）感到困惑。请求解决方案（通过归纳证明正确性）以更好地理解。