基本フォームをつくる(1)
円の面積を求める
結果：
if(isset($_POST[“cmdCalc”])){
$r=@$_POST[“hankei”];
$s=$r*$r*3.14;
echo “半径が “.$r.” のとき、円の面積は “.$s.” です。”;
}
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結果：
if(isset($_POST[“cmdCalc”])){
$r=@$_POST[“hankei”];
$s=$r*$r*3.14;
echo “半径が “.$r.” のとき、円の面積は “.$s.” です。”;
}