Question

我需要创建一个计算器，用户输入一个数字，然后计算给定数字的因子，立方体和平方。

以下是我正在使用的代码..我不知道如何计算出这个因素。任何意见，将不胜感激。

＆＃13;

document.getElementById('calculate').addEventListener('click', estimateTotal);

function estimateTotal(event) {
	event.preventDefault();
	var initial2 = document.getElementById('initial').value;
	
	document.getElementById('factor').value = 0;
	document.getElementById('sqaure').value = initial2 * initial2;
	document.getElementById('cube').value = initial2 * initial2 * initial2;
}

＆＃13;

<form id="calculator" method="POST">
    <p>Please enter a number between 0 and 50 <input name="initial" id="initial" type="text" size="20" required><button id="calculate">Calculate</button></p>
    <p>The Factorial of your number is: <input name="factor" id="factor" class="factor" type="text" size="20"></p>
    <p>The Square of your number is:<input name="sqaure" id="sqaure" class="sqaure" type="text" size="20"></p>
    <p>The Cube of your number is:<input name="cube" id="cube" class="cube" type="text" size="20"></p>
</form>

＆＃13;

Answer 1

  **recursive JavaScript function factor(n)**

 **Check this link:** **http://www.javascripter.net/math/primes/factorization.htm**

function factor(n) {
 if (isNaN(n) || !isFinite(n) || n%1!=0 || n==0) return ''+n;
 if (n<0) return '-'+factor(-n);
     var minFactor = leastFactor(n);
 if (n==minFactor) return ''+n;
 return minFactor+'*'+factor(n/minFactor);
}

Answer 2

尝试使用因子和因子

document.getElementById('calculate').addEventListener('click', estimateTotal);

function estimateTotal(event) {
	event.preventDefault();
	var initial2 = document.getElementById('initial').value;
	
	document.getElementById('Factorial').value = fact(initial2);
  document.getElementById('factor').value = factors(initial2);
	document.getElementById('sqaure').value = initial2 * initial2;
	document.getElementById('cube').value = initial2 * initial2 * initial2;
	
}


   function fact(n)
            {
                if(n == 0)
                    return 1;
                else
                    return (n*fact(n-1));
            }


  function factors(num)
{
 var
  n_factors = [],
  i;
 
 for (i = 1; i <= Math.floor(Math.sqrt(num)); i += 1)
  if (num % i === 0)
  {
   n_factors.push(i);
   if (num / i !== i)
    n_factors.push(num / i);
  }
 n_factors.sort(function(a, b){return a - b;});  // numeric sort
 return n_factors;
}

<p>Please enter a number between 0 and 50 <input name="initial" id="initial" type="text" size="20" required><button id="calculate">Calculate</button></p>
<p>The Factorial of your number is: <input name="factor" id="Factorial" class="factor" type="text" size="20"></p>

<p>The Factor of your number is: <input name="factor" id="factor" class="factor" type="text" size="20"></p>
<p>The Sqaure of your number is:<input name="sqaure" id="sqaure" class="sqaure" type="text" size="20"></p>
<p>The Cube of your number is:<input name="cube" id="cube" class="cube" type="text" size="20"></p>

如何在javascript中找到整数因子？

2 个答案: