ATM有4个选项:
1/存钱 2/取钱 3/查询余额 4/退出, 输入对应的数字进行操作.
卡里默认有100元,对卡里的100元进行存取查询等操作.
<script>var qian=100;do {var layer = prompt('输入你的操作:' + '\n' + '1/存入' + '\n' + '2/取出' + '\n' + '3/查询' + '\n' + '4/退出');if (layer == 1) {var cunqian=prompt('输入存入金额');qian=qian+parseFloat(cunqian);alert('当前余额' + qian);} else if (layer ==2 ){var quqian = prompt('输入取出的钱数');qian = qian - parseFloat(quqian);alert('当前余额' + qian);} else if (layer ==3 ){alert('当前的余额是' + qian);} else if (layer == 4){alert('已退出');}} while (layer != 4)</script>
