通过javascript打印出100---999之间的水仙花数 153=1^3+5^3+ 3^3

153/100
       (153-1*100)/10
       153-1*100-5*10
       */
       document.write("100---999之间的水仙花数为：");
       document.write("<br>");
      
       for(i = 100; i < 1000;i++){
           var num1 = Math.floor(i/100);
           var num2 = Math.floor((i - num1*100)/10);
           var num3 = Math.floor(i-(num1*100)-(num2 * 10));
           var num =( Math.pow(num1,3)+Math.pow(num2,3)+Math.pow(num3,3));
        if( i==num ){        
        document.write(i + "=" + num1 + "^3" + "+" + num2 + "+" + "^3"+"+"+ + num3 +"^3" + "<br>");
        }
    }