this is what i have but i need to record the problems that are wrong and have the user answer them until there right, keep prompting the user for the problem until its right this was a 4 part problem and part3 is to have the same problem repeat until its completed
ex.(7+1=6) repeat(7+1=4) repeat (7+1=8) next problem
the user has to complete 5 problems and they have to be correct
<html>
<script>
var file=0;
var fileIndex=new Array();
var user=prompt("what is "+a+" + "+b);
var arr=[user,user,user,user,user];
var a=Math.floor(Math.random()*11);
var b=Math.floor(Math.random()*11);
var answer=parseInt(a+b);
var user=prompt("what is "+a+" + "+b);
while (user != answer && file++ != 4) {
fileIndex.push(user);
user = prompt("what is " + a + "+" + b);
} else {
alert("answer is:" + answer);
}
}//close for
</script>
Update:
var a = 1,
b = 1;
var answer = a + b,
tick = 0;
var file_index = [], copy;
function randomize() {
a = Math.floor(Math.random() * 11);
b = Math.floor(Math.random() * 11);
answer = a + b;
}
while (1)
{
if ((copy = prompt("What is " + a + " + " + " b?", 0)) != answer)
{
if (!copy) break;
file_index.push(copy);
randomize();
} else if (tick == 4) {
break;
} else {
++tick;
}
}
jsFiddle Demo
Related
I am writing a code that produces a random math quiz. However, when I run it (in an app called SoloLearn) it I get a Syntax error even though there doesn’t appear to be any. I even tested it in JSHint and no Syntax errors seemed to be present. Here is my code:
function random(max) {
return Math.floor(Math.random() * Math.floor(max));
}
function start() {
var form = document.getElementById("name_form");
var name = form.elements[0].value;
var score = 0;
alert("Let's begin!");
for (let i = 0; i < 4; i++) {
var num1 = random(10);
var num2 = random(10);
var operator = random(2);
if (operator == 0) {
var question = prompt(num1 + " + " + num2 + " =");
var answer = num1 + num2;
}
else {
var question = prompt(num1 + " - " + num2 = " =");
var answer = num1 - num2;
}
if (question == answer) {
alert("Correct!");
score++;
}
else {
alert("Incorrect ):");
}
}
document.write(score);
}
What is going on here?
In your line var question = prompt(num1 + " - " + num2 = " ="); you have misspelled a '+' which is a '=' in your code.
It should be:
var question = prompt(num1 + " - " + num2 + " =");
The same as #Nick Parsons said in the comments
Syntax error should be fixed by changing
var question = prompt(num1 + " - " + num2 = " =");
to
var question = prompt(num1 + " - " + num2 + " =");
which is the intent I believe
Simple button that should be creating new <p> elements when its clicked but it isn't working and I'm not sure why as I've compared it to other code of mine.
Demo
var battle = function() {
while(monsterHP > 0){
var playerDam = Math.floor(Math.random() * ((playerAtk - monsterAtk) + 2);
$('#battle').append("<p>You have hit the monster for " + playerDam + " damage. The monster has " + (monsterHP - playerDam) + "HP left</p>");
monsterHP -= playerDam;
if(monsterHP <= 0) {
$('#battle').append("<p>You have defeated the monster</p>");
}
}
}
$('#battleButton').click(function() {
battle();
}
You have many syntax errors in your code. If you correct them (as below), then it works fine. When you write a JQuery append, you need to put a ')' after your argument. Likewise, functions need to have a '}' after them.
var playerAtk = 5;
var playerDef = 5;
var playerHP = 10;
var monsterAtk = 4;
var monsterDef = 4;
var monsterHP = 8;
var battle = function() {
while(monsterHP > 0){
var playerDam = Math.floor(Math.random() * ((playerAtk - monsterAtk) + 2));
$('#battle').append("<p>You have hit the monster for " + playerDam + " damage. The monster has " + (monsterHP - playerDam) + "HP left</p>");
monsterHP -= playerDam;
if(monsterHP <= 0) {
$('#battle').append("<p>You have defeated the monster</p>");
}
}
}
$('#battleButton').click(function() {
battle();
});
So, i'm adding 2 characters 4 levels together (hp, attack, strength and defense) and then comparing them. However I am having a problem. when the numbers are added together they're added together as a string so it outputs as follows. 9060951/99709940 instead of 246 (90+60+95+1)/308 (99+70+99+40). Here is what I am doing.
function calculate(player1, player2) {
var total1 = player1.getTotal();
var total2 = player2.getTotal();
var differencePercentage;
if(total1 > total2) {
differencePercentage = total2 + "/" + total1 + " = " + (total2/total1);
} else {
differencePercentage = total1 + "/" + total2 + " = " + (total1/total2);
}
var percentage = differencePercentage;
return percentage;
}
function Player(hp, attack, strength, defense) {
this.hp = parseInt(hp);
this.attack = parseInt(attack);
this.strength = parseInt(strength);
this.defense = parseInt(defense);
this.getTotal = function() {
var total = 0;
total = hp + attack + strength + defense;
return total;
}
}
Why is this happening?
You are parsing the Ints into this.hp, this.attack etc. in your Player function but not into the getTotal function
Try this
this.getTotal = function() {
var total = 0;
total = this.hp + this.attack + this.strength + this.defense;
return total;
}
I can't figure this out I keep getting stuck in a loop. I don't know if I have my calculation or if statements in the right areas, please I could use some help. My output is like a end of day report. I could really use the help.
<script type="text/javascript">
<!--
// assignments
var cost, nachosCounter, moneyCollected, nachosRate, corndogRate, hotdogRate;
var hamAccum, hotdogAccum, corndogAccum, nachosAccum, hamburgerRate;
var beginDay, orderType, hamCounter, hotdogCounter, corndogCounter;
var totalHotdog, totalNachos, totalCorndog, totalHamburger, moneyCollected;
var hamburgerRate = 4;
var hotDogRate = 2;
var cornDogRate = 3;
var nachosRate = 5;
var hamCounter = 0;
var hotdogCounter = 0;
var corndogCounter = 0;
var nachosCounter = 0;
var beginDay = "yes"
//initalizing loop
beginDay = "yes"
//start loop
while (beginDay == "yes")
{
orderType = prompt("hamburger, hotdog, corndog, nachos", "");
if (orderType == "hamburger")
{
hamCounter = hamCounter + 1;
if (hamCounter == 1)
{
hamAccum = "<br>The total number of hamburgers purchased: " + hamCounter;
}
else
{
hamAccum = hamAccum + "<br>" + hamCounter;
}
}
else if (orderType == "hotdog")
{
hotdogCounter = hotdogCounter + 1;
if (hotdogCounter == 1)
{
hotdogAccum = "The total number of hotdog purchased:<br>" + hotdogCounter;
}
else
{
hotdogAccum = hotdogAccum + "<br>" + hotdogCounter;
}
}
if (orderType == "corndog")
{
corndogCounter = corndogCounter + 1;
if (corndogCounter == 1)
{
corndogAccum = "<br>The total number of corndogs purchased: <br>" + corndogCounter;
}
else
{
corndogAccum = corndogAccum + "<br>" + corndogCounter;
}
}
if (orderType == "nachos")
{
nachosCounter = nachosCounter + 1;
if (nachosCounter == 1)
{
nachosAccum = "<br>The total number of nachos purchased: <br>" + nachosCounter;
}
else
{
nachosAccum = nachosAccum + "<br>" + nachosCounter;
}
}
totalHotdog = hotdogCounter*hotDogRate;
totalHamburger = hamCounter*hamburgerRate;
totalCorndog = corndogCounter*cornDogRate;
totalNachos = nachosCounter*nachosRate;
moneyCollected = totalNachos+totalCorndog+totalHamburger+totalHotdog;
beginDay = prompt("More to add?", "yes");
}
//output
document.write(hotdogAccum);
document.write(hamAccum);
document.write(corndogAccum);
document.write(nachosAccum);
document.write("<br>The total dollar amount for hotdog: $ " + totalHotdog);
document.write("<br>The total dollar amount for hamburger: $ " + totalHamburger);
document.write("<br>The total dollar amount for corndogs: $" + totalCorndog);
document.write("<br>The total dollar amount for nachos: $" + totalNachos);
document.write("The total amount of money collected: $" + moneyCollected);
// -->
</script>
To preface this, we are a small organization and this system was built by someone long ago. I am a total novice at javascript so I have trouble doing complicated things, but I will do my best to understand your answers. But unfortunately redoing everything from scratch is not really an option at this point.
We have a system of collecting data where clients use a login to verify a member ID, which the system then uses to pull records from an MS Access database to .ASP/html forms so clients can update their data. One of these pages has the following function that runs on form submit to check that data in fields a/b/c sum to the same total as d/e/f/g/h/i. It does this separately for each column displayed (each column is a record in the database, each a/b/c/d/e/f is a field in the record.)
The problem is with this section of the function:
for (var j=0; j<recCnt; j++) {
sumByType = milesSurf[j] + milesElev[j] + milesUnder[j];
sumByTrack = milesSingle[j] + milesDouble[j] + milesTriple[j] + milesQuad[j] + milesPent[j] + milesSex[j];
etc.
It should use javascript FOR to loop through each record and test to see if they sum to the same thing.
In Firefox and IE this is working properly; the fields sum properly into "sumByType" and "sumByTrack". You can see below I added a little alert to figure out what was going wrong:
alert(sumByType + " " + j + " " + recCnt + " " + milesSurf[j] + " " + milesElev[j] + " " + milesUnder[j]);
In Chrome, that alert tells me that the components of "sumByType" and "sumByTrack" (the various "milesXXXXX" variables) are undefined.
My question is: Why in Chrome is this not working properly, when in IE and FFox it is? Any ideas?
Full function code below:
function submitCheck(formy, recCnt) {
//2/10/03: added milesQuad
//---------------checks Q#4 that Line Mileage by type is the same as by track
var milesElev = new Array();
var milesSurf = new Array();
var milesUnder = new Array();
var milesSingle = new Array();
var milesDouble = new Array();
var milesTriple = new Array();
var milesQuad = new Array();
var milesPent = new Array();
var milesSex = new Array();
var sumByType = 0;
var milesLineTrack = new Array(); //this is for Q5 to compare it to mileage by trackage
var j = 0; var sumByTrack = 0; var liney; var yrOp;
//var str = "document.frm.milesElev" + j;
//alert(str.value);
for (var i in document.frm) {
if (i.substring(0, i.length - 1) == "milesElev") {
milesElev[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesSurf") {
milesSurf[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesUnder") {
milesUnder[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesSingle") {
milesSingle[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesDouble") {
milesDouble[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesTriple") {
milesTriple[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesQuad") {
milesQuad[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesPent") {
milesPent[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length - 1) == "milesSex") {
milesSex[parseInt(i.substring(i.length-1, i.length))] = parseFloat(document.frm[i].value); }
if (i.substring(0, i.length -1) == "milesLineTrack") {
milesLineTrack[parseInt(i.substring(i.length-1, i.length))] = document.frm[i].value; } //12/13/02 used to be parseFloat(document.frm[i].value)
if (i.substring(0,5)=="Lines") {
liney = document.frm[i].value;
if (parseInt(liney)<1 || isNaN(liney)) {
alert("Each mode must have at least 1 line. Please correct the value in question #2.");
document.frm[i].select(); return false; }}
if (i.substring(0,8)=="yearOpen") {
yrOp = document.frm[i].value;
if (parseInt(yrOp)<1825 || isNaN(yrOp)) {
alert("Please enter a year after 1825 for question #3");
document.frm[i].select(); return false; }
}
}
for (var j=0; j<recCnt; j++) {
sumByType = milesSurf[j] + milesElev[j] + milesUnder[j];
sumByTrack = milesSingle[j] + milesDouble[j] + milesTriple[j] + milesQuad[j] + milesPent[j] + milesSex[j];
//---------------to round sumByTrack and sumByType from a long decimal to a single decimal place, like frm 7.89999998 to 7.9.
sumByTrack = sumByTrack * 10;
if (sumByTrack != parseInt(sumByTrack)) {
if (sumByTrack - parseInt(sumByTrack) >= .5) {
//round up
sumByTrack = parseInt(sumByTrack) + 1; }
else { //truncate
sumByTrack = parseInt(sumByTrack); }}
sumByTrack = sumByTrack / 10;
sumByType = sumByType * 10;
if (sumByType != parseInt(sumByType)) {
if (sumByType - parseInt(sumByType) >= .5) {
//round up
sumByType = parseInt(sumByType) + 1; }
else { //truncate
sumByType = parseInt(sumByType); }}
sumByType = sumByType / 10;
//-------------end of rounding ---------------------------
if (sumByType != sumByTrack) {
if (isNaN(sumByType)) {
sumByType = "(sum of 4.a., b., and c.) "; }
else {
sumByType = "of " + sumByType; }
if (isNaN(sumByTrack)) {
sumByTrack = "(sum of 4.d., e., f., g., h., and i.) "; }
else {
sumByTrack = "of " + sumByTrack; }
alert("For #4, the 'End-to-End Mileage By Type' " + sumByType + " must equal the 'End-to-end Mileage By Trackage' " + sumByTrack + ".");
alert(sumByType + " " + j + " " + recCnt + " " + milesSurf[j] + " " + milesElev[j] + " " + milesUnder[j]);
return false;
}
//alert (milesLineTrack[j] + " " + milesSingle[j] + " " + 2*milesDouble[j] + " " + 3*milesTriple[j] + " " + 4*milesQuad[j] + " " + 5*milesPent[j] + " " + 6*milesSex[j]);
var singDoubTrip = (milesSingle[j] + 2*milesDouble[j] + 3*milesTriple[j] + 4*milesQuad[j] + 5*milesPent[j] + 6*milesSex[j])
//----------round singDoubTrip to one digit after the decimal point (like from 6.000000001 to 6.0)
singDoubTrip = singDoubTrip * 10;
if (singDoubTrip != parseInt(singDoubTrip)) {
if (singDoubTrip - parseInt(singDoubTrip) >= .5) {
//round up
singDoubTrip = parseInt(singDoubTrip) + 1; }
else { //truncate
singDoubTrip = parseInt(singDoubTrip); }}
singDoubTrip = singDoubTrip / 10;
//----------end round singDoubTrip-----------------------------------------
if (parseFloat(milesLineTrack[j]) != singDoubTrip) {
//var mlt = milesLineTrack[j];
//if isNaN(milesLineTrack[j]) { mlt =
alert("For column #" + (j+1) + ", the mainline passenger track mileage of " + milesLineTrack[j] + " must equal the single track plus 2 times the double track plus 3 times the triple track plus 4 times the quadruple track plus 5 times the quintuple track plus 6 times the sextuple track, which is " + singDoubTrip + ".");
return false;
}
}
//---------------------end of checking Q#4----------------
//return false;
}
I think for (var i in document.frm) is the problem. You should not enumerate a form element, there will be plenty of unexpected properties - see Why is using "for...in" with array iteration a bad idea?, which is especially true for array-like objects. I can't believe this works properly in FF :-)
Use this:
var ele = document.frm.elements; // or even better document.getElementById("frm")
for (var i=0; i<ele.length; i++) {
// use ele[i] to access the element,
// and ele[i].name instead of i where you need the name
}
Also, you should favour a loop over those gazillion of if-statements.