Question

我试图制作一个javascript程序，将20到100之间的数字换成单词。所以我写了这个 -

var num = prompt("enter a number");
if (num>20 && num<100)
{
 words(num);
}
else alert("Please enter a number between 20 and 100");

function words(num)
{
var ones = ["","one","two","three","four","five","six", "seven","eight",  "nine"];
var tens = ["", "", "twenty","thirty","fourty","fifty","sixty","seventy","eighty","ninety"];

var div= num/10;
var rem= num%10;

if (rem==0)
    document.write(num+" = "+tens[div]);
else
    document.write(num+" = "+tens[div]+" "+ones[rem]);

}

问题是如果我输入30,40这样的数字可以被10整除我得到正确的输出但如果我输入32它将显示“32 =未定义的两个”。我做错了什么？我是JS的新手，所以不太了解。

Answer 1

32/10为3.2，而不是3。你必须对结果进行舍入。

更改

 var div= num/10;

到

 var div= Math.floor(num/10);

Answer 2

你应该这样做

var rem= num%10;
var div= (num - rem)/10;

因为25/10 = 2.5 not 2

工作Fiddle

没有在javascript中获得所需的输出

2 个答案: