回傳未識別的JavaScript陣列

嗨，我需要一些幫助，我對編碼還很陌生，我似乎無法讓我的函式正常作業，它一直回傳未定義，任何提示將不勝感激。謝謝

var german = ["eins","zwei","drei","vier","fünf","sechs","sieben","acht","neun","zehn","elf","zw?lf","dreizehn","vierzehn","fünfzehn","sechzehn","siebzehn","achtzehn","neunzehn","zwanzig","einundzwanzig","zweiundzwanzig","dreiundzwanzig","vierundzwanzig","fünfundzwanzig","sechsundzwanzig","siebenundzwanzig","achtundzwanzig","neunundzwanzig","dreiβig"];
var french = ["un","duex","trois","quatre","cinq","six","sept","huit","neuf","dix","onze","douze","treize","quatorze","quinze","seize","dix-sept","dix-huit","dix-neuf","vingt","vingt et un","vingt-deux","vingt-trois","vingt-quatre","vingt-cinq","vingt-six","vingt-sept","vingt-huit","vingt-neuf","trente"];

var translatedNumber = translate();


var number = prompt("Please enter a number between 1-30 to be translated");
    if (number > 30 || number < 1) {
        alert("Please enter a number between 1-30")
        exit()
    }
    else if(isNaN(number)){
        alert("Please enter digits")
        exit()
    }


var language = prompt("Translated into what language? French/German");

    if (language == "german" || language == "french"){
    translate();
    } 
    else{
    alert("Only French or German is allowed")
    exit()
    }

function translate(number,language,translatedNumber,french,german){
    if(language == "german"){
        var translatedNumber = german[number - 1];
        }
    
    else if(language == "french"){
        var translatedNumber = french[number - 1];
        }
    return translatedNumber;
}

alert("The translation is "   translatedNumber);

uj5u.com熱心網友回復：

修復：

（問題是你沒有正確設定你的函式。我將 translate 函式變數更改為 lan 和 num 因為它們是你在函式中使用的僅有的兩個。另外我認為你不需要在頂，因為你還沒有使用它）希望這有幫助：D。）

var german = ["eins","zwei","drei","vier","fünf","sechs","sieben","acht","neun","zehn","elf","zw?lf","dreizehn","vierzehn","fünfzehn","sechzehn","siebzehn","achtzehn","neunzehn","zwanzig","einundzwanzig","zweiundzwanzig","dreiundzwanzig","vierundzwanzig","fünfundzwanzig","sechsundzwanzig","siebenundzwanzig","achtundzwanzig","neunundzwanzig","dreiβig"];
var french = ["un","duex","trois","quatre","cinq","six","sept","huit","neuf","dix","onze","douze","treize","quatorze","quinze","seize","dix-sept","dix-huit","dix-neuf","vingt","vingt et un","vingt-deux","vingt-trois","vingt-quatre","vingt-cinq","vingt-six","vingt-sept","vingt-huit","vingt-neuf","trente"];

var translatedNumber;


var number = prompt("Please enter a number between 1-30 to be translated");
    if (number > 30 || number < 1) {
        alert("Please enter a number between 1-30")
        exit()
    }
    else if(isNaN(number)){
        alert("Please enter digits")
        exit()
    }


var language = prompt("Translated into what language? French/German");

    if (language == "german" || language == "french"){
    translate(language, number);
    } 
    else{
    alert("Only French or German is allowed")
    exit()
    }

function translate(lan, num){
    if(lan == "german"){
        translatedNumber = german[num - 1];
        } else if(lan == "french"){
        translatedNumber = french[num - 1];
        }
    return translatedNumber;
}

alert("The translation is "   translatedNumber);

uj5u.com熱心網友回復：

關于您的代碼需要注意的一些事項：

1. 該exit功能沒有定義。
2. 您translatedNumber是從另一個函式中修改的全域變數。避免這樣的全域變數。
3. 您應該先檢查變數是否為數字，然后再檢查它是否在所需的范圍內。

希望以下是您正在尋找的內容：

const german = ["eins","zwei","drei","vier","fünf","sechs","sieben","acht","neun","zehn","elf","zw?lf","dreizehn","vierzehn","fünfzehn","sechzehn","siebzehn","achtzehn","neunzehn","zwanzig","einundzwanzig","zweiundzwanzig","dreiundzwanzig","vierundzwanzig","fünfundzwanzig","sechsundzwanzig","siebenundzwanzig","achtundzwanzig","neunundzwanzig","dreiβig"];
const french = ["un","duex","trois","quatre","cinq","six","sept","huit","neuf","dix","onze","douze","treize","quatorze","quinze","seize","dix-sept","dix-huit","dix-neuf","vingt","vingt et un","vingt-deux","vingt-trois","vingt-quatre","vingt-cinq","vingt-six","vingt-sept","vingt-huit","vingt-neuf","trente"];

try {
  const number = prompt("Please enter a number between 1-30 to be translated");
  if (isNaN(number))
    throw({ message: "Please enter digits"});
  if (number > 30 || number < 1)
    throw({ message: "Please enter a number between 1-30"});

  const language = prompt("Translated into what language? French/German");
  if (language == "german" || language == "french"){
    const translatedNumber = translate(number, language);
    alert("The translation is "   translatedNumber);    
  } 
  else
    throw({ message: "Only French or German is allowed"});
} catch (error) {
  alert(error.message);
}

function translate(number,language){
  return language == "german" ?  german[number - 1] : french[number - 1];
}

標籤：javascript 数组 功能

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