js加法问题 我想做个记账本，就是别人输入金额，然后自动求和。怎么在html中加入js算法？

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js加法问题 我想做个记账本，就是别人输入金额，然后自动求和。怎么在html中加入js算法？,第1张

js

=========================================================

<script language="javascript">

function get_sum(){

var sum = 0

var a,b,c

a = document.getElementById('jl1').value>0?document.getElementById('jl1').value:0

b = document.getElementById('jl2').value>0?document.getElementById('jl2').value:0

c = document.getElementById('jl3').value>0?document.getElementById('jl3').value:0

sum = parseFloat(a) + parseFloat(b) + parseFloat(c)

document.getElementById('result').innerHTML = sum

}

</script>

html

==========================================================

<p>

金额1

<input type="text" id="jl1">

</p>

<p>金额2

<input type="text" id="jl2">

</p>

<p>金额3

<input type="text" id="jl3">

</p>

<p>

<input type="button" value="求和" onClick="get_sum()"><span id="result"></span>

</p>

ps

===========================================================

如果是自动求和，则去掉button，在text加上事件 onKeyUp="get_sum()"

This is a completed finance app with Swift 3 And Nodejs.

The purpose i write it is i'm try to be a fullstack developer.

The ScreenShot as below

GitHub

Swift 3 + Realm + RxSwift + Alamofire

The project use Carthage as packmanager, please execute 'carthage update' before run

The project use npm &&MongoDB, please make sure you install it all before run

email: funpig@hotmail.com

QQ: 550462 (pls comments: github)

CNode

MIT