Question

我被指示创建一个从用户那里获取10个数字的程序。然后它应该显示它并找到它与平均值的差异（从输入的10个数字。）我已经搞乱了一段时间的代码，但我不确定我做错了什么。当我在浏览器中打开时，计算不正确。

var number = new Array(10);
for(var i=0; i<10; i++) {
var number = prompt("PLEASE ENTER A NUMBER");
total =  parseInt(number);
average = total/10; 
document.write("The difference from the average for the number, " + number + 
"is equal to " + (number - average) +  "<br>");
}

Answer 1

起初你根本不需要阵列，你只需要总结一下：

＆＃13;

var total = 0;

for (var count = 1; count <= 10; count++) {
  const number = parseInt(prompt("A number (again):"));
  //increase total by the inputted number
  total += number;
  const average = total / count;
  document.body.innerHTML += `The ${count} number is ${number}, the average is ${average} and they differ by ${average - number}`;
}

＆＃13;

您可能会注意到我已尽可能多地使用const（导致常量事情更好处理），以及模板文字（{{1在我看来，这使得它更具可读性。

Answer 2

    var number = new Array(10);
    var total; //create a variable for your total
    var average; //create a variable for your average
    for(var i=0; i<10; i++) 
    {
    var number[i] = prompt("PLEASE ENTER A NUMBER"); //make sure all the 
                                                     //numbers have their 
                                                     //own ids which is 'i' 
                                                     //in this case
    total +=  parseInt(number); //this basically means total = previoustotal        
             //+ newly parsed number
    }

    average = total/10; //leave this outside because you want to do the 
                        //calculations at the end

    for(var i=0; i < number.length ; i++)
    {
    document.write("The difference from the average for the number," +
    number[i] + "is equal to " + (number[i] - average) +  "<br>");
    } //this will print out a difference output for all 10 numbers you 
      //inputted

不确定您的CSS和HTML是如何制作的，所以我只是将br留在那里

Answer 3

这是因为您的每个输入都会在您获得其他数字之前开始计算平均值。您可能希望等待所有输入，然后进行计算。

总而言之，你必须添加数字。可能你需要的只是让你的数学正确。

var number = new Array(10);
var total = 0;
for(var i=0; i<10; i++) {
   number[i] = parseInt(prompt("PLEASE ENTER A NUMBER\n"));
   total +=  parseInt(number[i]);
}
var average = total / number.length
for(var i=0; i<10; i++) {
    alert("The difference from the average for the number, " + number[i] + 
"is equal to " + (number[i] - average));
}

Answer 4

您好，亲爱的朋友，首先我有一个问题，您是否为控制台或网络编码？

如果您为控制台做，您必须这样写：

var number = new Array(10);
var total = 0;
for(var i=0; i<10; i++) {
var number = console.log("PLEASE ENTER A NUMBER\n");
total = total + parseInt(readline());
}
average = total/10; 
console.log("The difference from the average for the number, " + number + 
"is equal to " + (number - average));

并且按照您的方式，您只需将代码更改为：

var number = new Array(10);
var total = 0 ; 
    for(var i=0; i<5; i++) {
    var number = prompt("PLEASE ENTER A NUMBER");
    total = total + parseInt(number);
    }
    average = total/5; 
    document.write("The difference from the average for the number, " + number + 
    "is equal to " + (number - average) +  "<br>");

var number = new Array(10);
var total = 0 ; 
    for(var i=0; i<5; i++) {
    var number = prompt("PLEASE ENTER A NUMBER");
    total = total + parseInt(number);
    }
    average = total/5; 
    document.write("The difference from the average for the number, " + number + 
    "is equal to " + (number - average) +  "<br>");

如何从阵列中的提示中一起添加多个输入？

4 个答案: