我在使用一些JavaScript做while循环时遇到麻烦

Question

I am writing a code guessing program to test the security of some iPhone passwords (This is not in anyway connected to anything illegal or is used to break into actual iPhones). The do/while loops just end all response once they occur and the last two lines don't print to the console.

print("Hi!");
print("I am a password security tester.");

var tries = 0

var guess1 = 0
var guess2 = 0
var guess3 = 0
var guess4 = 0

var guess = (guess1 * 1000) + (guess2 * 100) + (guess3 * 10) + guess4;

var password1 = (Math.floor(Math.random()*9));
var password2 = (Math.floor(Math.random()*9));
var password3 = (Math.floor(Math.random()*9));
var password4 = (Math.floor(Math.random()*9));

var password = (password1 * 1000) + (password2 * 100) + (password3 * 10) + password4;

print("This is the randomly genorated password: " + password);
print("And now begins the guessing");

do{
    guess1 + 1;
    tries + 1;
}while (password1 != guess1);

do{
    guess2 + 1;
    tries + 1;
}while (password2 != guess2);

do{
    guess3 + 1;
    tries + 1;
}while (password3 != guess3);

do{
    guess4 + 1;
    tries + 1;
}while (password4 != guess4);

print("Complete in " + tries + " tries");
print("The answer is: " + guess);

Answer 1

Jacob Ewing's answer is correct, but another problem is that guess will still be 0 at the end, because it doesn't automatically update. You'll need to do:

var guess = (guess1 * 1000) + (guess2 * 100) + (guess3 * 10) + guess4;

Before:

print("Complete in " + tries + " tries");
print("The answer is: " + guess);

Answer 2

You need to be using a += operator instead of just +

Saying guess1 + 1 returns the value of guess1 + 1 , but does not increment that value directly, so you get an infinite loop.