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black-black-cat/index.html

Last active July 9, 2021 01:38
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arith 四则运算
Raw
index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>GistRun</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>Hello world!</h1>
<input id="in" type="text">
<div id="res"></div>
<script src="https://raw.githack.com/marlun78/arith/master/arith.js"></script>
<script src="script.js"></script>
</body>
</html>
Raw
script.js
let input = document.querySelector('#in')
let result = document.querySelector('#res')
function breakStr(arr) {
let v = ''
let arr2 = []
for (let i = 0; i < arr.length; i++) {
let char = arr[i]
if (char == '*' || char == '/' || char == '+' || char == '-') {
arr2.push(v)
v = ''
arr2.push(char)
} else {
v += char
}
if (i === arr.length - 1) {
arr2.push(v)
v = ''
}
}
return arr2
}
input.addEventListener('blur', () => {
let arr = input.value.replace(' ', '').split('')
let memo = arr[0]
let arr2 = breakStr(arr)
console.log(arr2)
let res = arith(arr2[0])
for (let i = 1; i < arr2.length; i+=2) {
let v = arr2[i]
let x = arr2[i+1]
if (v == '+') {
res = res.add(x)
}
if (v == '-') {
res = res.subtract(x)
}
if (v == '*') {
res = res.multiply(x)
}
if (v == '/') {
res = res.divide(x)
}
}
result.innerText = res.value()
})
Raw
styles.css
/* todo: add styles */
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