Javascript科学计算器输入错误

Question

Working on a calculator with basic sin and cosine functions.

Code in jsfiddle: http://jsfiddle.net/C9VcE/

Getting an error where I can only enter one character for the input.

Also currently sin function

function call_func(sin) {
        output=Number (numberone, numbertwo)
        document.getElementById('equation').value =output; 
    }

seems to have issues where until I press 'Clear" the calculator won't change values.

Thanks in advance.

Answer 1

The problem with your code lies in the getnumber function definition.

Please change the code as specified below and give a try.

function getnumber (number) {
            var val = document.getElementById('equation').value;
            document.getElementById('equation').value = val.toString() + number;

            if(numberone=="") {
                numberone=number;
            /*document.getElementById('equation').value =numbertwo; */
            } else {
                numbertwo=number;
            /*document.getElementById('equation').value =numberone; */
            }

        }

Answer 2

I've seen your code. You need to put this line

document.getElementById('equation').value =document.getElementById('equation').value+number; 

But then you need to trim and convert this string to number correctly