Javascript問題與輸出

Question

我有一個程序在js應該檢查問題的進位數，即55 + 20 = 0進位數和總值= 75.檢查答案有問題，我可以似乎沒有弄清楚它是什麼。但是，當我使用這種方法時，它沒有給出正確的輸出並且說每個答案都是錯誤的。

var topNumber = new Array();//top number 
topNumber[1] = "35"; 

var bottomNumber = new Array();//bottom number 
bottomNumber[1] = "20"; 

var answer = Array();//answer 
answer[1] = "55"; 

var carryover = new Array();//carry over number 
carryover[1] = "0"; 

//create arrays to store user information 

var userCarry = []; 

var userAsn = []; 

//creates user values 

var userCarry1 = ""; 

var userAsn1 =""; 

//sets the number of questions to zero 
var qnumber = 0;  
//creates a function to display the page number, math problem, and an alert to save the user name. 
function nextQuestions() { 
    //every time the user clicks on the button the number will increase and will display question number and it will be used to display the rest of the question information. 
    qnumber = qnumber + 1; 
    document.getElementById('questionNumber').value = qnumber; 
     //sets up question numbers with qnumber is equal to a specific question number. 
    switch (qnumber) { 
     case 1: 
     // question number and question 
     document.getElementById('topQuestionNumber').value = topNumber[1]; 
     document.getElementById('bottomQuestionNumber').value = bottomNumber[1]; 
     //creates values to store the user information 
     userCarry1 = document.getElementById('carryOverNumber').value; 
     userAsn1 = document.getElementById('answerNumber').value; 
     break; 


//creates a function that will check if the user value is equal to the answer 

function checkAnswer() { 
    if((answer[1] == userAsn1) && (userCarry1 == carryover[1])) { 
     alert("Your answer is correct!" + userCarry1 + userAsn1); 
    } 
    if((answer[2] == userAsn2) && (userCarry2 == carryover[2])) { 
     alert("Your answer is correct! " + userCarry2 + " "+ userAsn2); 
    } 
    if((answer[3] == userAsn3) && (userCarry3 == carryover[3])) { 
     alert("Your answer is correct! " + userCarry3 + " "+ userAsn3); 
    } 
    if((answer[4] == userAsn4) && (userCarry4 == carryover[4])) { 
     alert("Your answer is correct! " + userCarry4 + " "+ userAsn4); 
    } 
    if((answer[5] == userAsn5) && (userCarry5 == carryover[5])) { 
     alert("Your answer is correct! " + userCarry5 + " "+ userAsn5); 
    } 
    if((answer[6] == userAsn6) && (userCarry6 == carryover[6])) { 
     alert("Your answer is correct! " + userCarry6 + " "+ userAsn6); 
    } 
    if((answer[7] == userAsn7) && (userCarry7 == carryover[7])) { 
     alert("Your answer is correct! " + userCarry7 + " "+ userAsn7); 
    } 
    if((answer[8] == userAsn8) && (userCarry8 == carryover[8])) { 
     alert("Your answer is correct! " + userCarry8 + " "+ userAsn8); 
    } 
    if((answer[9] == userAsn9) && (userCarry9 == carryover[9])) { 
     alert("Your answer is correct! " + userCarry9 + " "+ userAsn9); 
    } 
    if((answer[10] == userAsn10) && (userCarry10 == carryover[10])) { 
     alert("Your answer is correct! " + userCarry10 + " "+ userAsn10); 
    } 
    else { 
     alert("Your answer is wrong."); 
    } 


} 

Answer 1

我最好的猜測是，你是用變量的類型搞亂

topNumber [1] =「35」，告訴它是一條繩子的程序，不是int

我會嘗試topNumber [1] = 35;和parseInt（）用戶輸入以便安全地進行比較