如果它们相等，如何更改2个Math.floor随机数

Question

我正在尝试复制Monty Hall问题，如果你已经听说过，我需要添加一个系统，当它们相等时会改变两个Math.floor随机数中的一个。我的问题是，如果它等于第二个随机变量，如何将随机变量变为另一变量。如果你看一下Monty Hall问题，错误的变量将是一个错误的选择并且门是正确的，我将两者都设置为随机，但显然，它们不能都是平等的。这是我到目前为止所做的。

        setInterval(gr, 1000)

function gr() {
     if (wrong === door) {
        door = Math.floor((Math.random() * 3) + 1);
    }
}

         var door1 = 0;
var door2 = 0;
var door3 = 0;
var door;
var wrong; 
var attempt = 0;

var d1 = document.getElementById('door1');
var d2 = document.getElementById('door2');
var d3 = document.getElementById('door3');

setInterval(gr, 1000)

function gr() {
    if (wrong === door) {
    door = Math.floor((Math.random() * 3) + 1);
    }
}

function dr1() {
    document.getElementById('door1').style.pointerEvents = 'none';
    document.getElementById('door2').style.pointerEvents = 'none';
    document.getElementById('door3').style.pointerEvents = 'none';
    document.getElementById('door1').style.backgroundColor = "green";
    door1 = 1;
    if (door2 === 1) {
        document.getElementById('door2').style.backgroundColor = "black";
        door2 = 0;
    } else if (door3 === 1) {
        document.getElementById('door3').style.backgroundColor = "black";
        door3 = 0;
}
     if (attempt === 0) {
    wrong = Math.floor((Math.random() * 2) + 1);
    door = Math.floor((Math.random() * 3) + 1);
    if (wrong === 1) {
        document.getElementById('door2').style.backgroundColor = "white";
        change1a();
} else if (wrong === 2) {
    document.getElementById('door3').style.backgroundColor = "white";
    change1b();
      }
    }
    attempt = 1;
 }
 function dr2() {
    document.getElementById('door1').style.pointerEvents = 'none';
    document.getElementById('door3').style.pointerEvents = 'none';
    document.getElementById('door2').style.backgroundColor = "green";
    door2 = 1;
    if (door1 === 1) {
        document.getElementById('door1').style.backgroundColor = "black";
        door1 = 0;
        } else if (door3 === 1) {
        document.getElementById('door3').style.backgroundColor = "black";
        door3 = 0;
        }
        if (attempt === 0) {
    wrong = Math.floor((Math.random() * 2) + 1);
    door = Math.floor((Math.random() * 3) + 1);
    if (wrong === 1) {
        document.getElementById('door1').style.backgroundColor = "white";
        change2a();
    } else if (wrong === 2) {
        document.getElementById('door3').style.backgroundColor = "white";
        change2b();
    }
  }
    attempt = 1;
}
function dr3() {
    document.getElementById('door1').style.pointerEvents = 'none';
    document.getElementById('door2').style.pointerEvents = 'none';
    document.getElementById('door3').style.backgroundColor = "green";
    door3 = 1;
    if (door1 === 1) {
    document.getElementById('door1').style.backgroundColor = "black";
    door1 = 0;
    } else if (door2 === 1) {
        document.getElementById('door2').style.backgroundColor = "black";
        door2 = 0;
    }
    if (attempt === 0) {
    wrong = Math.floor((Math.random() * 2) + 1);
    door = Math.floor((Math.random() * 3) + 1);
    if (wrong === 1) {
        document.getElementById('door1').style.backgroundColor = "white";
        change3a();
    } else if (wrong === 2) {
        document.getElementById('door2').style.backgroundColor = "white";
        change3b();
    }
}
    attempt = 1;
}
  function change1a() {
    document.getElementById('door3').style.pointerEvents = "all";
}

function change1b() {
    document.getElementById('door2').style.pointerEvents = "all";
}

function change2a() {
    document.getElementById('door3').style.pointerEvents = "all";
}

function change2b() {
    document.getElementById('door1').style.pointerEvents = "all";
} 

}

Answer 1

我尝试调整你的代码，但是对我来说，理解你想做的一切看起来太乱了。所以，相反，我决定创建自己的，只是为了好玩。你可以在那里获得灵感。

要回答您的具体问题，这就是我选择门的方式：

var selectedDoor = 1,
    correctDoor = 2,
    losingDoor = getLosingDoor();

function getLosingDoor() {
  var losingDoor;
  do {
    losingDoor = Math.floor((Math.random() * 3) + 1);
  } while ([correctDoor, selectedDoor].indexOf(losingDoor) > -1);

  return losingDoor;
}

完整演示

// Create a MontyHall instance in the #app div
var myMontyHall = MontyHall(document.getElementById('app'));

function MontyHall(container) {
  var self = {
    // Will hold DOM references
    refs: null,
    // Will hold the MontyHall instance's state
    state: null,
    /*
     * Creates the doors in the DOM and in the state
     */
    init: function() {
      self.state = {
        attempts: 0,
        doorCount: 3,
        correctDoor: self.getRandomInt(0, 3)
      };

      self.refs = {
        container: container,
        instructions: document.createElement('p'),
        doorsWrapper: document.createElement('div'),
        doors: []
      };

      // Reset container
      self.refs.container.innerHTML = '';
      // Setup a container for the doors
      self.refs.doorsWrapper.className = 'doors-wrapper';
      self.refs.container.appendChild(self.refs.doorsWrapper);
      // Setup a container for instructions
      self.say('Please select a door.');
      self.refs.container.appendChild(self.refs.instructions);
      // For each door
      for (var i=0; i<self.state.doorCount; i++) {
        // Create a div
        var el = document.createElement('div');
        // Give it a class
        el.className = 'door';
        // Add click event listener
        (function(index) {
          el.addEventListener('click', function(){
            self.clickOnDoor(index);
          });
        })(i);
        // Append it to the doors container
        self.refs.doorsWrapper.append(el);
        // Store a reference to it
        self.refs.doors.push(el);
      }
      return self;
    },
    /*
     * Called when a door is clicked
     */
    clickOnDoor: function(index) {
      self.state.selectedDoor = index;
      // If this is the first attempt
      if (self.state.attempts === 0) {
        // Show it is selected
        self.refs.doors[self.state.selectedDoor].classList.add('selected');
        // Find a non selected losing door
        self.state.losingDoor = self.getLosingDoor();
        // Open it
        self.refs.doors[self.state.losingDoor].classList.add('disabled', 'loser');
        // Update instructions
        self.say(
            'You selected door #' + (index + 1) + '.<br>'
          + 'I opened door #' + (self.state.losingDoor + 1) + ', '
          + 'it contains a sheep.<br>'
          + 'You can now keep your choice, or change your mind.'
        );
        self.state.attempts++;
      } else {
        // For each door
        self.refs.doors.forEach(function(el, i) {
          // Disable it
          el.classList.add('disabled');
          // Show it as a winner or a loser
          el.classList.add(i === self.state.correctDoor ? 'winner' : 'loser');
          // Show it as selected or not
          el.classList.toggle('selected', i === index);
        });
        // Update instructions
        self.say(
          (
            self.state.correctDoor === index ?
            '<span class="green">Congratulations, you won!</span>' :
            '<span class="red">Sorry, you lost...</span>'
          )
          + '<br>'
          + 'The gold was behind door #' + (self.state.correctDoor + 1) + '.<br>'
          + '<button class="restart">Play again</button>'
        );
        // Enable restart button
        self.refs.instructions.querySelector('.restart')
                              .addEventListener('click', self.init);
      }
    },
    /*
     * Returns the index of a losing door, which is not selected
     */
    getLosingDoor: function() {
      var losingDoor;
      do {
        losingDoor = self.getRandomInt(0, self.state.doorCount);
      } while ([
                 self.state.correctDoor,
                 self.state.selectedDoor
               ].indexOf(losingDoor) > -1);

      return losingDoor;
    },
    /*
     * Sets the instructions innerHTML
     */
    say: function(html) {
      self.refs.instructions.innerHTML = html;
    },
    /*
     * Returns an integer between min and max
     */
    getRandomInt: function(min, max) {
      return Math.floor((Math.random() * (max-min)) + min);
    }
  };

  return self.init();
}

/* I minified the CSS to avoid cluttering my answer. Full version in link below  */body{font-family:Arial,Helvetica,sans-serif;text-align:center}p{margin-top:.2em}button{margin-top:.5em}.door{display:inline-block;width:3em;height:5em;border:1px solid #000;margin:.5em;background-image:url(https://image.ibb.co/c7mssS/doors.jpg);background-size:300% 100%;background-position:center;cursor:pointer;box-shadow:0 0 5px 1px #1070ff;transition:all .3s ease}.door:not(.disabled):hover{opacity:.9}.door.selected{box-shadow:0 0 5px 3px #b910ff}.door.loser{background-position:right}.door.winner{background-position:left}.door.disabled{pointer-events:none}.door.disabled:not(.selected){box-shadow:none}span{font-weight:700}.green{color:#42e25d}.red{color:#ff2f00}

<div id="app"></div>

JSFiddle demo