3-3练习
来源：3-3 编程练习
代码两万行
2019-02-25 21:46:32
$strans[]=['id'=>'612','name'=>'bus','weight'=>'300','capacity'=>'22']; $strans[]=['id'=>'1580','name'=>'taxi','weight'=>'210','capacity'=>'5']; $strans[]=['id'=>'300','name'=>'coach','weight'=>'550','capacity'=>'86']; //向数组里添加交通工具“motorbike”: $strans[3]=['id'=>'105','name'=>'motorbike','weght'=>'100','capacity'=>'2']; //把“coach”改为“truck” $strans[2]['name']='truck'; //并将其载重改为350 $strans[2]['weight']='350'; //输出bus的乘载量 echo "输出bus的乘载量".$strans[0]['weight']."<br/>"; //输出修改后的“truck”的信息 echo "修改后的信息是:".$strans[2]['name']='truck'."<br/>"; echo "修改后的信息是:".$strans[2]['weight']='350'."<br/>"; //删除“bus”的“载重”属性 unset($strans[0]['weight']); //删除“taxi”交通工具 unset($strans[1]); echo "<pre>"; //打印输出存储交通工具的数组 print_r($strans); echo "</pre>";
老师帮我看下代码正确吗， ？
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1回答
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guly
2019-02-26
你好，有几处没有显示出来，建议参考如下代码：
<?php echo '<pre>'; //二维数组 $trans[]=['id'=>612,'name'=>'bus','weight'=>300,'capacity'=>22]; $trans[]=['id'=>158,'name'=>'taxi','weight'=>210,'capacity'=>5]; $trans[]=['id'=>300,'name'=>'coach','weight'=>550,'capacity'=>86]; print_r($trans); echo'<br><br><br>'; echo $trans[0]['name'].'的乘载量是：'.$trans[0]['capacity'].'<br>'; //查 echo'<br><br><br>'; $trans[]=['id'=>105,'name'=>'motorbike','weight'=>100,'capacity'=>2]; //增 print_r($trans); $trans[2]['name']='truck'; //改 $trans[2]['weight']=350; print_r($trans[2]); unset($trans[0]['weight']); //删除 unset($trans[1]); print_r($trans); echo '</pre>'; ?>
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