이것 또한 인터넷을 보면서 따라 만들어 본것이다. 조금의 css또한 HTML에 포함 시켰다.```
<!DOCTYPE html> <html> <head> <title>내가 만든 계사나가기가ㅣ가ㅣ</title> <style> table { border-collapse: collapse; } td { padding: 5px 10px; text-align: center; } input { text-align: right; border: none; } input:focus { outline: none; } </style> </head> <body> <table border="1"> <tr> <td colspan="4"> <input type="text" id="display"> </td> </tr> <tr> <td colspan="4"> <input type="text" id="result"> </td> </tr> <tr> <td colspan="3" onclick="reset()" style="background-color: grey;" >AC</td> <td onclick="add('/')" style="background-color: grey;" >/</td> </tr> <tr> <td onclick="add(7)" style="background-color :slategrey;" >7</td> <td onclick="add(8)" style="background-color :slategrey;">8</td> <td onclick="add(9)" style="background-color :slategrey;">9</td> <td onclick="add('*')" style="background-color: grey;" >*</td> </tr> <tr> <td onclick="add(4)" style="background-color :slategrey;" >4</td> <td onclick="add(5)" style="background-color :slategrey;" >5</td> <td onclick="add(6)" style="background-color :slategrey;" >6</td> <td onclick="add('-')" style="background-color: grey;" >-</td> </tr> <tr> <td onclick="add(1)" style="background-color :slategrey;" >1</td> <td onclick="add(2)" style="background-color :slategrey;" >2</td> <td onclick="add(3)" style="background-color :slategrey;" >3</td> <td onclick="add('+')" style="background-color: grey;" >+</td> </tr> <tr> <td colspan="2" onclick="add(0)" style="background-color :slategrey;" >0</td> <td onclick="add('.')" style="background-color: grey;" >.</td> <td onclick="calculate()" style="background-color: red;" >=</td> </tr> </table> <script> function add(char) { var display = document.getElementById('display'); display.value = display.value + char; } function calculate() { var display = document.getElementById('display'); var result = eval(display.value); document.getElementById('result').value = result; } function reset() { document.getElementById('display').value = ""; document.getElementById('result').value = ""; } </script> </body> </html>