<span> 跳至 [1] </span> [全屏预览] <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush: php; auto-links: false; "><? /* 作者: shyhero 邮箱: shyhero@outlook.com Q Q: 1757424878 */ // 计算1+12+123+1234+12345+...+1234567 for($i=1;$i<=7;$i++){ $str .= $i; } $str = (int)$str; var_dump($str); $sum = 0; for($i=$str;$i>=1;$i=(int)($i/10)){ $sum += $i; } echo $sum; ?></pre><div class="contentsignin">登录后复制</div></div> <style type="text/css"> .code_report{float:right} .code_report div{ float: left; margin-left: 5px; background: url("/img/ask-icon.gif") no-repeat; padding: 6px 0 6px 15px; padding-left: 15px; height: 16px;} .code_report a{ background: url("/img/ask-icon.gif") 0 -160px no-repeat;padding-left: 20px; line-height: 15px;height: 16px; color: #333; text-decoration: none; display:inline-block; zoom:1; vertical-align: middle;} .code_report em{ height: 28px; line-height:28px; width: 14px; display: inline-block; float: left; background: url("/img/ask-icon.gif") top right;} </style>