Skip to content

Made a simple fully functional calculator! #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Ankur-Agrawal-ece20 wants to merge 3 commits into
base: master
Choose a base branch
from
Open

Made a simple fully functional calculator! #1

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
e08a2b4
Made a simple fully functional calculator!
Ankur-Agrawal-ece20 Aug 30, 2021
0247844
Updated- Clear screen first time on pressing any key.
Ankur-Agrawal-ece20 Aug 30, 2021
7b809ba
Added animation on butttons.
Ankur-Agrawal-ece20 Aug 30, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
50 changes: 50 additions & 0 deletions index.html
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,50 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<title>Calculator</title>
</head>
<body>
<div id="mainbody">
<div id="display">
<div></div>
<div id="col1"> <div id="firstdis">CALCULATOR</div> </div>
<div id="operation">=></div>
<div id="col2"><marquee behavior="alternate">Press any key to start!</marquee></div>
</div>
<div id="history">
<button id="hisbtn" onclick="showhis()">&#x1F552;</button>
<div id="lastval"></div>
</div>
<div id="numpad">
<button onclick="clearnow()" style="color: lightseagreen;">C</button>
<button onclick="operate('%')" style="color: lightseagreen;">%</button>
<button onclick="backspace()" id="cross">
&#x25C0;
<div>X</div>
</button>
<button onclick="operate('/')" style="color: lightseagreen;">&#247;</button>
<button onclick="update('7')">7</button>
<button onclick="update('8')">8</button>
<button onclick="update('9')">9</button>
<button onclick="operate('*')" style="color: lightseagreen;">X</button>
<button onclick="update('4')">4</button>
<button onclick="update('5')">5</button>
<button onclick="update('6')">6</button>
<button onclick="operate('-')" style="color: lightseagreen;">-</button>
<button onclick="update('1')">1</button>
<button onclick="update('2')">2</button>
<button onclick="update('3')">3</button>
<button onclick="operate('+')" style="color: lightseagreen;">+</button>
<button onclick="update('00')">00</button>
<button onclick="update('0')">0</button>
<button onclick="update('.')">.</button>
<button onclick="solve()" style="color: lightseagreen;">=</button>
</div>
</div>
<script src="main.js"></script>
</body>
</html>
134 changes: 134 additions & 0 deletions main.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,134 @@
col1=document.getElementById("col1");
opr=document.getElementById("operation");
col2=document.getElementById("col2");
historyele=document.getElementById("lastval");
let a=0,b=0,ans=0,deci=0,check="",cnt=0;
function clearnow(){
col1.innerHTML="";
col2.innerHTML="";
opr.innerHTML="";
a=0;b=0;ans=0;deci=0;
}
function update(str){
if(document.getElementById("firstdis")) clearnow();
if(str=='.'){
if(deci!=1) col2.innerHTML=col2.innerHTML+str;
deci=1;return;
}
if(deci==1 && str[0]=='0'){
col2.innerHTML=col2.innerHTML+str;
return;
}
let prev=b;
b=parseFloat(col2.innerHTML+str)
if(b.toString()!=col2.innerHTML+str){
alert("Maximum Limit Attained!");
b=prev;
return;
}
col2.innerHTML=col2.innerHTML+str;
}
function backspace(){
if(document.getElementById("firstdis")) clearnow();
if(col2.innerHTML=="") return;
col2.innerHTML=col2.innerHTML.slice(0, -1);
b=parseFloat(col2.innerHTML);
}

function updatehistory(k){
var arr=(JSON.parse(localStorage.getItem("History"))||[]);
// if(arr==null) arr=[];

// console.log(typeof(arr))
if(k==1){
var value=a.toString()+check+b.toString()+"="+ans.toString();
arr.push(value);
}
if(arr.length==0) return;
if(arr.length>10) arr.shift();
historyele.innerHTML="<div>";
var i=arr.length-1;
for(let j=0;j<arr[i].length;j++){
if(arr[i][j]=='=')
historyele.innerHTML+="<br>";
historyele.innerHTML+=arr[i][j];
}
historyele.innerHTML+="</div>";
localStorage.setItem("History",JSON.stringify(arr));
}
function operate(str){
if(document.getElementById("firstdis")) clearnow();
if(b!=0) a=b;b=0;
deci=0;cnt=0;
col1.innerHTML=a.toString();
col2.innerHTML="";
opr.innerHTML=str;check=str;
if(str=='*') opr.innerHTML="X";
if(str=='/') opr.innerHTML="&#247;";
}
function solve(){
if(document.getElementById("firstdis")) clearnow();
if(check==""){
alert("Incomplete Operation");
return;
}
if(check=='+'){
ans=a+b;
col1.innerHTML=ans.toString();
col2.innerHTML="";
opr.innerHTML="";
}
if(check=='-'){
ans=a-b;
col1.innerHTML=ans.toString();
col2.innerHTML="";
opr.innerHTML="";
}
if(check=='*'){
ans=a*b;
col1.innerHTML=ans.toString();
col2.innerHTML="";
opr.innerHTML="";
}
if(check=='/'){
ans=a/b;
col1.innerHTML=ans.toString();
col2.innerHTML="";
opr.innerHTML="";
}
if(check=='%'){
ans=a*b/100;
col1.innerHTML=ans.toString();
col2.innerHTML="";
opr.innerHTML="";
}
updatehistory(1);
a=ans;b=0;ans=0;check="";deci=0;cnt=0;
}
updatehistory(0);

function showhis(){
var arr=(JSON.parse(localStorage.getItem("History"))||[]);
if(cnt==arr.length){
return;
}
clearnow();
let i=arr.length-1-cnt;
let sw=0;
for(let j=0;j<arr[i].length;j++){
if(sw==0) col1.innerHTML+=arr[i][j];
else col2.innerHTML+=arr[i][j];
if(arr[i][j]=='=') sw=1;
}
b=parseFloat(col2.innerHTML);
cnt=cnt+1;
if(cnt==arr.length) return;
historyele.innerHTML="<div>";
i=arr.length-1-cnt;
for(let j=0;j<arr[i].length;j++){
if(arr[i][j]=='=')
historyele.innerHTML+="<br>";
historyele.innerHTML+=arr[i][j];
}
historyele.innerHTML+="</div>";
}
86 changes: 86 additions & 0 deletions style.css
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,86 @@
#mainbody{
border:3px solid black;
padding: 3px;
width: 350px;
margin: 0;
border-radius: 5px;
position: absolute;
top: 50%;
left: 50%;
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
}
#display{
border: 2px solid black;
height: 90px;
margin: 2px;
background-color: rgb(172, 235, 231);
border-radius: 5px;
display: grid;
grid-template-columns: 15.625% 84.375%;
overflow: hidden;
}
#col1{
grid-column: 1/span 2;
}
#display div{
font-size: 27px;
margin: 3px;
text-align: right;
}
#firstdis{
text-align:center !important;
font-weight: 900;
}
#history{
margin: 2px;
border: 2px solid black;
border-radius: 3px;
display: grid;
grid-template-columns: max-content auto;
}
#hisbtn{
background-color:black;
border:none;
font-size: 25px;
}
#lastval{
height: 50px;
font-size: 25px;
padding: 3px;
text-align: right;
overflow:hidden;
}
#numpad{
display: grid;
grid-template-columns: 25% 25% 25% 25%;
}
#numpad button{
font-size: 24px;
font-size: 900;
height: 60px;
border: none;
}
#numpad button:active{
transform: scale(0.98);
box-shadow: 3px 2px 22px 1px rgba(0, 0, 0, 0.377);
}
#cross{
display: flex;
color: lightseagreen;
font-size: 24px;
align-items: center;
text-align: center;
justify-content: center;
}
#cross div{
border:2px solid lightseagreen;
font-size: 15px;
font-weight: 800;
width: 20px;
}
@media screen and (max-width: 375px) {
#mainbody{
width: 90%;
}
}