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57 lines
1.3 KiB
57 lines
1.3 KiB
1 month ago
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let currentInput = '';
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let previousInput = '';
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let operation = null;
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function appendNumber(number) {
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currentInput += number.toString();
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document.getElementById('display').value = currentInput;
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}
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function appendDecimal(dot) {
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if (!currentInput.includes(dot)) {
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currentInput += dot;
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document.getElementById('display').value = currentInput;
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}
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}
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function chooseOperation(op) {
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if (currentInput !== '') {
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previousInput = currentInput;
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operation = op;
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currentInput = '';
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}
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}
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function calculateResult(equals) {
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let result;
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const prev = parseFloat(previousInput);
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const curr = parseFloat(currentInput);
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if (isNaN(prev) || isNaN(curr)) return;
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switch (operation) {
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case '+':
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result = prev + curr;
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break;
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case '-':
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result = prev - curr;
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break;
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case '*':
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result = prev * curr;
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break;
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case '/':
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result = prev / curr;
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break;
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default:
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return;
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}
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currentInput = result.toString();
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document.getElementById('display').value = currentInput;
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previousInput = '';
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operation = null;
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}
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function clearDisplay() {
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currentInput = '';
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previousInput = '';
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operation = null;
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document.getElementById('display').value = '';
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}s
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