作为程序员，没有合适的工具，就得手搓一个，PC端，移动端均可适用。废话不多说，直接上代码。
HTML:
<div class="calculator"><input id="principal" type="number" placeholder="输入本金 (元)"> <input id="rate" type="number" placeholder="输入年利率 (%)"> <input id="time" type="number" placeholder="输入时间 (年)"><button onclick="calculateInterest()">计算利息</button><div id="result" class="result"></div></div>
JS:
function calculateInterest() { const principal = parseFloat(document.getElementById('principal').value); const rate = parseFloat(document.getElementById('rate').value); const time = parseFloat(document.getElementById('time').value); if (isNaN(principal) || isNaN(rate) || isNaN(time) || principal <= 0 || rate <= 0 || time <= 0) { document.getElementById('result').innerText = '错误：请输入有效的本金、利率和时间。'; return; } const interest = (principal * rate * time) / 100; // 利息 = 本金 * 利率 * 时间 const totalAmount = principal + interest; document.getElementById('result').innerText = `利息: ${interest.toFixed(2)} 元, 总金额: ${totalAmount.toFixed(2)} 元`; }
CSS:
.calculator { width: 100%; background-color: #333; color: white; padding: 20px; border-radius: 10px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); } label { display: block; margin-bottom: 10px; font-size: 16px; } input, select { width: 100%!important; padding: 10px!important; margin-bottom: 20px; color: #000000; border-radius: 5px; border: 1px solid #555; font-size: 16px!important; background-color: #ffffff!important; } button { width: 100%; padding: 10px; background-color: #007bff; color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 16px; } button:hover { background-color: orange; } .result { font-size: 18px; margin-top: 20px; text-align: center; } option { background-color: #ffffff; } p { font-size: 18px; margin-top: 5px!important; }
