+
+
+
+
\ No newline at end of file
diff --git a/Calculator/calculator.js b/Calculator/calculator.js
new file mode 100644
index 0000000..557181a
--- /dev/null
+++ b/Calculator/calculator.js
@@ -0,0 +1,122 @@
+const buttonContainer = document.querySelector('.buttons');
+const prevElement = document.querySelector('.prev');
+const currentElement = document.querySelector('.current');
+var currentNumber = '',
+ prevNumber = '',
+ sign = '';
+buttonContainer.addEventListener('click', function (e) {
+ //console.log(e.target);
+ const type = e.target.dataset.type;
+ const text = e.target.textContent;
+ if (type == 'equal') {
+ calculate();
+ } else if (type == 'operate') {
+ operate(text);
+ } else if (type == 'delete') {
+ deletenum();
+ } else if (type == 'clear') {
+ clear();
+ } else {
+ pushNumber(text);
+ }
+ updateScreen();
+});
+
+function pushNumber(num) {
+ if (num == 'e') num = Math.E;
+ if (num == 'Π') num = Math.PI;
+ currentNumber = currentNumber + num;
+}
+
+function clear() {
+ currentNumber = '';
+ prevNumber = '';
+ sign = '';
+}
+
+function deletenum() {
+ if (!currentNumber.toString().length) {
+ return currentNumber = currentNumber.toString().slice(0, -1);
+ }
+}
+
+function operate(text) {
+ var result = 0;
+ if (currentNumber == '') return;
+ //如果用户未输入数字，就输入操作符，直接return
+ sign = text;
+ prevNumber = currentNumber;
+ const prev = Number(prevNumber);
+ currentNumber = '';
+ switch (sign) {
+ case 'ln':
+ result = Math.log(prev);
+ break;
+ case 'lg':
+ result = Math.log10(prev);
+ break;
+ case 'tan':
+ result = Math.tan(prev);
+ break;
+ case 'cos':
+ result = Math.cos(prev);
+ break;
+ case 'sin':
+ result = Math.sin(prev);
+ break;
+ case '√x':
+ result = Math.sqrt(prev);
+ break;
+ case 'x^2':
+ result = Math.pow(prev, 2);
+ break;
+ case '%':
+ result = prev / 100;
+ break;
+ default:
+ return;
+ }
+ currentNumber = result.toFixed(6);
+ sign = '';
+}
+
+function calculate() {
+ var result = 0;
+ const prev = Number(prevNumber);
+ const current = Number(currentNumber);
+ switch (sign) {
+ case '+':
+ result = prev + current;
+ break;
+ case '-':
+ result = prev - current;
+ break;
+ case '×':
+ result = prev * current;
+ break;
+ case '÷':
+ result = prev / current;
+ break;
+ case 'x^y':
+ result = Math.pow(prev, current);
+ break;
+ default:
+ return;
+ }
+ if (result % 1 == 0) {
+ currentNumber = result;
+ } else {
+ currentNumber = result.toFixed(6);
+ }
+ sign = '';
+}
+
+function updateScreen() {
+ currentElement.textContent = currentNumber;
+ //如果用户输入了操作符，那么prevNumber一定有值；
+ if (sign) {
+ prevElement.textContent = `${prevNumber} ${sign}`;
+ } else {
+ prevElement.textContent = '';
+ }
+}
\ No newline at end of file
diff --git a/Calculator/delete/iconfont.css b/Calculator/delete/iconfont.css
new file mode 100644
index 0000000..e58baa2
--- /dev/null
+++ b/Calculator/delete/iconfont.css
@@ -0,0 +1,19 @@
+@font-face {
+ font-family: "iconfont"; /* Project id 2921783 */
+ src: url('iconfont.woff2?t=1636343299487') format('woff2'),
+ url('iconfont.woff?t=1636343299487') format('woff'),
+ url('iconfont.ttf?t=1636343299487') format('truetype');
+}
+
+.iconfont {
+ font-family: "iconfont" !important;
+ font-size: 16px;
+ font-style: normal;
+ -webkit-font-smoothing: antialiased;
+ -moz-osx-font-smoothing: grayscale;
+}
+
+.icon-shanchu:before {
+ content: "\e620";
+}
+
diff --git a/Calculator/delete/iconfont.js b/Calculator/delete/iconfont.js
new file mode 100644
index 0000000..3097778
--- /dev/null
+++ b/Calculator/delete/iconfont.js
@@ -0,0 +1 @@
+!function(e){var t,n,o,i,c,d='