calculadora-js-style/index.html at main · bcroccia/calculadora-js-style · GitHub

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<html>
	<head>
		<title>Calculadora</title>

		<!-- Latest compiled and minified CSS -->
		<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">

    <style>
      .calculadora {
        margin-top: 40px;
        border: solid 1px #000;
        padding: 20px;
        background-color: #2E2E2E;
        border-radius: 10px;
        box-shadow: 1px 1px 5px #000;
      }

      .btn {
        width: 60px;
        height: 50px;
        margin: 5px;
        box-shadow: 1px 1px 1px #000;
      }

      .clear {
        width: 130px;
      }

      .enter {
        height: 110px;
      }

      .zero {
        width: 130px;
      }

      .resultado {
        text-align: right;
        font-size: 20px;
        margin-top: 10px;
        margin-bottom: 20px;
        border: solid 1px #000;
        box-shadow: 1px 1px 1px #000;
      }

    </style>
	</head>

  <body style="background: #D9D9D9">

    <div class="container">
      <div class="row">
        <div class="col d-flex justify-content-center">
          <br />

          <div class="calculadora">
            <input id="resultado" type="text" class="form-control resultado" placeholder="0" disabled="disabled" />

            <div class="row">
              <button onclick="calcular('acao','c')"  type="button" class="btn btn-dark btn-lg clear font-weight-light">C</button>
              <button onclick="calcular('acao','/')" type="button" class="btn btn-dark btn-lg font-weight-light">/</button>
              <button onclick="calcular('acao','*')" type="button" class="btn btn-dark btn-lg font-weight-light">x</button>
            </div>

            <div class="row">
              <button onclick="calcular('valor',7)"type="button" class="btn btn-dark btn-lg font-weight-light">7</button>
              <button onclick="calcular('valor',8)"type="button" class="btn btn-dark btn-lg font-weight-light">8</button>
              <button onclick="calcular('valor',9)"type="button" class="btn btn-dark btn-lg font-weight-light">9</button>
              <button onclick="calcular('valor','-')"type="button" class="btn btn-dark btn-lg font-weight-light">-</button>
            </div>

            <div class="row">
              <button onclick="calcular('valor',4)"type="button" class="btn btn-dark btn-lg font-weight-light">4</button>
              <button onclick="calcular('valor',5)"type="button" class="btn btn-dark btn-lg font-weight-light">5</button>
              <button onclick="calcular('valor',6)"type="button" class="btn btn-dark btn-lg font-weight-light">6</button>
              <button onclick="calcular('valor','+')"type="button" class="btn btn-dark btn-lg font-weight-light">+</button>
            </div>

            <div class="row">
              <button onclick="calcular('valor',1)" type="button" class="btn btn-dark btn-lg font-weight-light">1</button>
              <button onclick="calcular('valor',2)" type="button" class="btn btn-dark btn-lg font-weight-light">2</button>
              <button onclick="calcular('valor',3')" type="button" class="btn btn-dark btn-lg font-weight-light">3</button>
              <button onclick="calcular('acao','=')" type="button" class="btn btn-dark btn-lg enter">=</button>
            </div>

            <div class="row" style="margin-top: -60px">
              <button onclick="calcular('valor',0)" type="button" class="btn btn-dark zero btn-lg font-weight-light">0</button>
              <button onclick="calcular('acao','.')" type="button" class="btn btn-dark btn-lg font-weight-light">.</button>
            </div>

          </div>
        </div>
      </div>
    </div>

    <script>
      function calcular(tipo,valor) {

        if(tipo === 'acao') {

           if (valor === 'c') {
            //limpar o visor (id resultado)
            document.getElementById('resultado').value = ''
           }

           if (valor === '+' || valor === '-' || valor === '*' || valor === '/' || valor === '.') {
            document.getElementById('resultado').value += valor
           }

           if (valor === '=') {
            var valor_campo = eval(document.getElementById('resultado').value)

            document.getElementById('resultado').value = valor_campo
           }

        } else if (tipo === 'valor') {

          /* PARA O VALOR SER ACRESCIDO */
          document.getElementById('resultado').value += valor
        }

    }

    </script>

  </body>

</html>