:) 我有这个练习，我必须将 < 1000 的数字转换成英文单词。我正在尝试使用开关，但它无法返回数百 + 十年 + 单曲，因此它仅适用于 10 到 20 之间的数字。这是我的代码，我在在线 lint 检查器中检查了它，没有发现任何语法错误。
function check() {
var theinput = document.getElementById("theinput");
var answer = document.getElementById("answer");
var number = parseInt(theinput.value);
var singles = number % 10;
var decades = (number / 10) % 10;
var hundreds = (number / 100) % 10;
var text = "The english word for the given number is: ";
if (isNaN(number)) {
result = "Invalid Integer!";
}
else {
if (number > 999) {
result = "Please enter a maximum 3 digit number!"
}
else {
if (10 < number < 20) {
var teens = number;
switch (teens) {
case 11: result = text + "Eleven"; break;
case 12: result = text + "Twelve"; break;
case 13: result = text + "Thrirteen"; break;
case 14: result = text + "Fourteen"; break;
case 15: result = text + "Fifteen"; break;
case 16: result = text + "Sixteen"; break;
case 17: result = text + "Seventeen"; break;
case 18: result = text + "Eighteen"; break;
case 19: result = text + "Nineteen"; break;
}
}
else {
switch (singles) {
case 1: singles = "One"; break;
case 2: singles = "Two"; break;
case 3: singles = "Three"; break;
case 4: singles = "Four"; break;
case 5: singles = "Five"; break;
case 6: singles = "Six"; break;
case 7: singles = "Seven"; break;
case 8: singles = "Eight"; break;
case 9: singles = "Nine"; break;
default: singles = " ";
}
switch (decades) {
case 2: decades = "Twenty"; break;
case 3: decades = "Thrirty"; break;
case 4: decades = "Fourty"; break;
case 5: decades = "Fifty"; break;
case 6: decades = "Sixty"; break;
case 7: decades = "Seventy"; break;
case 8: decades = "Eightty"; break;
case 9: decades = "Ninety"; break;
default: decades = " ";
}
switch (hundreds) {
case 1: hundreds = "One hundred and "; break;
case 2: hundreds = "Two hundred and "; break;
case 3: hundreds = "Three hundred and "; break;
case 4: hundreds = "Four hundred and "; break;
case 5: hundreds = "Five hundred and "; break;
case 6: hundreds = "Six hundred and "; break;
case 7: hundreds = "Seven hundred and "; break;
case 8: hundreds = "Eight hundred and "; break;
case 9: hundreds = "Nine hundred and "; break;
default: hundreds = "";
}
result = text + hundreds + decades + singles;
}
}
}
answer.innerHTML = result;
}