?? ch04_q3.htm
字號:
<HTML>
<HEAD>
<SCRIPT LANGUAGE=JavaScript>
function fix(fixNumber, decimalPlaces)
{
var div = Math.pow(10,decimalPlaces);
fixNumber = new String(Math.round(fixNumber * div) / div);
var zerosRequired = decimalPlaces -
(fixNumber.length - fixNumber.lastIndexOf(".") - 1);
for (; zerosRequired > 0; zerosRequired--)
{
fixNumber = fixNumber + "0";
}
return fixNumber;
}
</SCRIPT>
</HEAD>
<BODY>
<SCRIPT LANGUAGE=JavaScript>
var number1 = prompt("Enter the number with decimal places you want to fix","");
var number2 = prompt("How many decimal places do you want?","");
document.write(number1 + " fixed to " + number2 + " decimal places is: ");
document.write(fix(number1,number2));
</SCRIPT>
</BODY>
</HTML>
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -