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<!DOCTYPE html> <html> <body> <h2>JavaScript 摄氏度到华氏度</h2> <p>在下面的输入字段之一中插入一个数字：</p> <p><input id="c" onkeyup="convert('C')"> 摄氏度</p> <p><input id="f" onkeyup="convert('F')"> 华氏度</p> <p>请注意，使用了 <b>Math.round()</b> 方法，因此结果将作为整数返回。</p> <script> function convert(degree) { var x; if (degree == "C") { x = document.getElementById("c").value * 9 / 5 + 32; document.getElementById("f").value = Math.round(x); } else { x = (document.getElementById("f").value -32) * 5 / 9; document.getElementById("c").value = Math.round(x); } } </script> </body> </html>