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前置运算符和后置运算符的区别

WBOY
Release: 2016-06-13 10:54:34
Original
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    $a = 0;                            //自定义变量并给定初始值

    echo "----------后置加运算---------
";                    

    for($b = 0;$b

        echo  $a++." ";                //使用后置运算符

    }

    echo "
----------前置加运算---------
";  

    $d = 0;  www.2cto.com

    for($b = 0;$b

        echo ++$d." ";                 //使用后置运算符

    }

    echo "
----------前置减运算---------
";

    $f =10;

    for($b = 10;$b >= 0;$b--){

        echo --$f." ";                 //使用前置运算符

    }

    echo "
----------后置减运算---------
";

    $g =10;

    for($b = 10;$b >= 0;$b--){

        echo $g--." ";                 //使用后置运算符

    }

?>

 

结果:

    

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