Question

我使用javascript构建了一个颜色猜谜游戏。如果在函数do_game中，循环不起作用。如果我在do_game之外得到它，它只是在check_guess中的第一个用于所有选项。请帮我解决这个问题。

    var chosen;
var userInputText;
var finished = false;
var guesses = 0;
var colors = ["aqua", "azure", "beige", "brown", "chocolate", "coral", "crismon", "gold", "lime", "linen", "snow", "tomato"];
/*  
  One way to set the background color of a web page is
  myBody=document.getElementsByTagName("body")[0];
  myBody.style.background=name_of_color;*/
function do_game() {
    "use strict";
    chosen = colors[Math.floor(Math.random() * colors.length)];
    while(!finished) {
        userInputText = prompt("I am thinking of one of these colors: \n\n aqua, azure, beige, brown, chocolate, coral, crismon, gold, lime, linen, snow, tomato\n\nWhat color am I thinking of?");
        guesses += 1;
        finished = check_guess();
    };
}

function check_guess() {
    "use strict";
    var idx = colors.indexOf(userInputText);
    if(idx === -1) {
        alert("Sorry, I don't recognize your color\n\n" + "Please try again.");
        return false;
    }
    if(userInputText > chosen) {
        alert("Sorry, your guess is not correct!\n\n" + "Hint: your color is alphabitcally higher than mine.\n\n" + "Please try again.");
        return false;
    }
    if(userInputText < chosen) {
        alert("Sorry, your guess is not correct!\n\n" + "Hint: your color is alphabitcally lower than mine.\n\n" + "Please try again.\n\n");
        return false;
    }if (userInputText === chosen) {
        alert("Congratulations! You have guesses the color!" + "It took you " + guesses + " to finish the game!" + "You can see the colour in the background");
        return true;
    }

}

Answer 1

此处未更新猜测值

guesses = +1;

用

替换它

guesses += 1

或

guesses++

Answer 2

这里的问题是全局变量。一旦调用一次后check_guess（）设置为true，它将阻止循环运行。把它放在do_game（）函数中。

function do_game() {
    "use strict";
    var finished = false;

    chosen = colors[Math.floor(Math.random() * colors.length)];

    while(!finished) {
        userInputText = prompt("I am thinking of one of these colors: \n\n aqua, azure, beige, brown, chocolate, coral, crismon, gold, lime, linen, snow, tomato\n\nWhat color am I thinking of?");
        guesses += 1;
        finished = check_guess();
    };
}

虽然循环在函数JS中不起作用

2 个答案: