Javascript For循環和函數將不返回任何內容

Question

當我執行此頁面時，沒有提示出現。 我想讓它起作用嗎？ 我對JavaScript相對較新，因此不勝感激！

function calc(correct, answer) {
  if (correct == answer) {
    alert("You hit the jackpot!");
  } else {
    alert("WRONG! the correct answer is: " + answer);
  }
}

var questions = ["2 x 10", "5 + 15", "25 - 20", "100 / 10", "9 x 2", "20 + 3", "5 - 5", "5 / 10", "1 + 11111", "0 + 14"];
var answers = [ 2 * 10,   5 + 15,   25 - 20,   100 / 10,   9 * 2,   20 + 3,   5 - 5,   5 / 10,   1 + 11111,   0 + 14 ];

for (var i=0; i<10; i++) {
  var answer = promt(questions[i]);
  calc(answer, answers[i]);
}

Answer 1

這是您的錯字：提示而不是提示

Answer 2

您應該使用“提示”。 並且在調用Calc方法之前，您還應該檢查null。

Answer 3

嘗試這個：

var questions = ["2 x 10", "5 + 15", "25 - 20", "100 / 10", "9 x 2", "20 + 3", "5 - 5", "5 / 10", "1 + 11111", "0 + 14"];
var answers = [ 2 * 10,   5 + 15,   25 - 20,   100 / 10,   9 * 2,   20 + 3,   5 - 5,   5 / 10,   1 + 11111,   0 + 14 ];

for (var i=0; i<10; i++) {
    (answers[i] == prompt(questions[i])) ?
    alert("You hit the jackpot!") :
    alert("WRONG! the correct answer is: " + answers[i])
}

Answer 4

除了您注意到其他打字錯誤prompt之外，您的游戲流程中可能還存在問題，因為您的for loop可能僅提示您一次並退出。

這里有一些更有趣的事情： 演示

var i = 0,
    playerScore = 0,
    QA = [
           ["2 x 10" , 2*10,  2],  //["Q", A, score-points-value]
           ["5 + 15" , 5+15,  1],
           ["25 - 20", 25-20, 1]
        ];

function calc() {    
  var question = QA[i][0]; 
  var answer   = QA[i][1];
  var points   = QA[i][2];  
  var correct  = answer == prompt("Question for "+ points +" points:\n"+ question );
  if(correct){
    playerScore += points;
    alert("Great! Your score is: "+ playerScore);
  }else{
   alert("Wrong, the correct answer is "+ answer ); 
  }
  calc(i++); // Move on with the game
}

calc(); // Start 

Answer 5

您輸入了“提示”功能的名稱錯誤。