CODEWITHSUNDEEP
javascriptpromptcalculation
zana1789
zana1789

Reputation: 25

Divide numbers from prompt in new function

I have a program written that calculates bank notes that you have to pay (2,5,10,20,...) from a number you type into the prompt.

I would like to take it further to the next step - I want to take that number from the prompt that was inserted on the first step and divide it by number user types into a new prompt to calculate the average cost of one item.

How can I do that?

This is the code that I have written for the first part. 

var stevilo = prompt("Vnesi znesek:");

var bankovec = [500, 200, 100, 50, 20, 10, 5, 2, 1];
var stevilo_bankovcev = 0;
var izpisi = "";
for (i = 0; i < bankovec.length; i++) {
  var y = stevilo / bankovec[i];
  if (y >= 1) {
    var razlika = Math.floor(y) * bankovec[i];
    stevilo = stevilo - razlika;
    stevilo_bankovcev = Math.floor(y) + stevilo_bankovcev;
    izpisi = izpisi + Math.floor(y) + "x" + bankovec[i] + ",";
    console.log(izpisi);
  }
}
window.onload = function() {
  document.getElementById("gremo").innerHTML = "Za plačilo je potrebno " + izpisi;
}
<span id="gremo"></span>

Upvotes: 1

Views: 220

Answers (3)

mplungjan
mplungjan

Reputation: 178422

Something like this?

function znesek() {
  var stevilo = prompt("Vnesi znesek:");
  const stevilo1 = stevilo; // take a copy
  var bankovec = [500, 200, 100, 50, 20, 10, 5, 2, 1];
  var stevilo_bankovcev = 0;
  var izpisi = "";
  for (i = 0; i < bankovec.length; i++) {
    var y = stevilo / bankovec[i];
    if (y >= 1) {
      var razlika = Math.floor(y) * bankovec[i];
      stevilo = stevilo - razlika;
      stevilo_bankovcev = Math.floor(y) + stevilo_bankovcev;
      izpisi = izpisi + Math.floor(y) + "x" + bankovec[i] + ",";
//      console.log(izpisi);
    }
  }
  document.getElementById("gremo").innerHTML = "Za plačilo je potrebno " + izpisi;
  setTimeout(function() { drugZnesek(stevilo1) } ,10); // allow DOM update
}
function drugZnesek(stevilo1) {
  var drugStevilo =  prompt("Vnesi drug znesek")
  if (stevilo1 && isNaN(stevilo1) || isNaN(drugStevilo)) {
    document.getElementById("gremo").innerHTML = "Žal ne številk";
    return;
  }
  else {
    console.log(stevilo1,drugStevilo,stevilo1/drugStevilo)
    document.getElementById("gremo").innerHTML += "<br/>"+(stevilo1/drugStevilo).toFixed(2)
  }
}  
window.addEventListener("load", znesek)
<span id="gremo"></span>

Upvotes: 0

jasper
jasper

Reputation: 945

You need to keep some local state, try this out:

Codepen

  <span id="gremo"></span>
  <span id="avg"></span>
  <button id="add">add item</button>

var pastItemPrices = [];

function calcBills() {
    var stevilo = prompt("Vnesi znesek:");
    pastItemPrices.push(parseInt(stevilo));
    var bankovec = [500, 200, 100, 50, 20, 10, 5, 2, 1];
    var stevilo_bankovcev = 0;
    var izpisi = "";
    for (i = 0; i < bankovec.length; i++) {
        var y = stevilo / bankovec[i]; 
        if (y >= 1) {
        var razlika = Math.floor(y) * bankovec[i];
            stevilo = stevilo - razlika;
            stevilo_bankovcev = Math.floor(y) + stevilo_bankovcev;
            izpisi = izpisi + Math.floor(y) + "x" + bankovec[i] + ",";
        }
    }
    document.getElementById("gremo").innerHTML = "Za plačilo je potrebno " + izpisi;
    document.getElementById("avg").innerHTML = "Average price: " + pastItemPrices.reduce((total, price) => total + price) / pastItemPrices.length
}

window.onload = function() {
    document.getElementById("add").addEventListener("click", calcBills);
    calcBills();
}

Upvotes: 1

Bg Zape
Bg Zape

Reputation: 40

I am not sure whether I understand the question correctly, but if the only thing you wanted to add to your program was another variable which user inputs, and then do a division with that variable, this would do the trick (although Im not entirely sure what the usage of this would be):

var stevilo = prompt("Vnesi znesek:");
var division = prompt("Dividing by this number:");

var bankovec = [500, 200, 100, 50, 20, 10, 5, 2, 1];
var stevilo_bankovcev = 0;
var total = stevilo/division;
var izpisi = "";
for (i = 0; i < bankovec.length; i++) {
  var y = stevilo / bankovec[i];
  if (y >= 1) {
    var razlika = Math.floor(y) * bankovec[i];
    stevilo = stevilo - razlika;
    stevilo_bankovcev = Math.floor(y) + stevilo_bankovcev;
    izpisi = izpisi + Math.floor(y) + "x" + bankovec[i] + ",";
    console.log(izpisi);
  }
}
window.onload = function() {
  document.getElementById("gremo").innerHTML = "Za plačilo je potrebno " + izpisi + " whereas the division's result is: " + total;
}
<span id="gremo"></span>

Basically just call another prompt, save it into another variable and then divide with it.

Regards, B

Upvotes: 1

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