Please help a javascript idiot

[newby229]

Could anyone help me amend this simple program.
I have to complete the following assignment ASAP and don't have a clue how:

Create 3 parallel arrays to store 15 contacts names, addresses and phone numbers.
Create a function to prompt the user for the contact details.
Create a function to print the details.
In the main part of the program the user is repeatedly asked whether they want to add a new contact or end the program. Add the necessary codes and call the functions as appropriate.

This is what I managed to do so far:

Code: Select all

//program to store contacts details

var max = 15
//create and initialize three parallel arrays
var names = new Array(max)
var address = new Array(max)
var telephone = new Array(max)

//function to add new contacts
function contacts()
{
for(var i = 0; i < max; i++){            
names[i] = prompt('Please enter the name here','')
address[i] = prompt('Please enter the address here','')
telephone[i] = prompt('Please enter the telephone number here','')}
};


//function to print contacts details
function print()
{
for(var i = 0; i < max i++){
document.write(    names[i] + '<BR>'+ address[i] + '<BR>' + telephone[i] + '<BR>' + '<BR>')}
};


//program starts here
var add
add = window.prompt('Do you want to add a new contact? (yes/no)?','')
if (add == 'yes'){
contacts()}

print()

The problem is the user is supposed to add a contact and then be asked if they wish to add a new one and so on, for 15 times. Whereas the program i created asks the user 15 times consecutively to add details and then prompts whether they wish to carry on. I tried to use a while loop instead but didn't work either.
I hope I made myself understood. i would really appreciate any suggestion

[c010depunkk]

Your problem is that the for loop is in the contacts function, it needs to be down to where you prompt "Do you want to add...". I myself don't have that much clue of javascript, but here's my (untested) version:

Code: Select all

//program to store contacts details

var max = 15;
//create and initialize three parallel arrays
var names = new Array(max);
var address = new Array(max);
var telephone = new Array(max);

//function to add new contacts
function getContact(index) {
 names[index] = prompt('Please enter the name here','');
 address[index] = prompt('Please enter the address here','');
 telephone[index] = prompt('Please enter the telephone number here','');
}

//function to print contacts details
function print()
{
 for(var i = 0; i < max; i++) {
  document.write( names[i] + '<BR>'+ address[i] + '<BR>' + telephone[i] + '<BR>' + '<BR>');
 }
}


//program starts here
for(var i = 0; i < max; i++){
 var add;
 add = window.prompt('Do you want to add a new contact? (yes/no)?','')
 if (add == 'yes') {
  getContact(i);
 } else {
  break; // so that the user doesn't have to say no 15 times if he wants to quit
 }

print();

Try that.

[newby229]

Thank you so much c010depunkk.
Finally the program works fine, the only problem is that I'm not allowed to use the 'break statement' because this is something my tutor hasn't covered yet, so I need to find an alternative way to stop the program.

THANK YOU AGAIN!

[c010depunkk]

No problem. What kind of a course are you taking?

[newby229]

Thank you for replying so quckly. I'm taking a javascript course for beginners covering only the very basic such as while, if and for loops, simple functions, simple arrays.
In this particular homework I need to use parallel arrays, 2 functions, and conditional statements.

You are very kind