Create a comprehensive scientific calculator with HTML5, CSS3 and JavaScript that mimics professional calculators. Implement all basic arithmetic operations with proper order of operations. Include advanced scientific functions (trigonometric, logarithmic, exponential, statistical) with degree/radian toggle. Add memory operations (M+, M-, MR, MC) with visual indicators. Maintain a scrollable calculation history log that can be cleared or saved. Implement full keyboard support with appropriate key mappings and shortcuts. Add robust error handling for division by zero, invalid operations, and overflow conditions with helpful error messages. Create a responsive design that transforms between standard and scientific layouts based on screen size or orientation. Include multiple theme options (classic, modern, high contrast). Add optional sound feedback for button presses with volume control. Implement copy/paste functionality for results and expressions.
使用 HTML5、CSS3 和 JavaScript 创建一个功能全面的科学计算器，能够模拟专业计算器。实现所有基本算术运算，并遵循正确的运算顺序。包含高级科学函数（三角函数、对数、指数、统计），并支持角度/弧度切换。添加内存操作（M+、M-、MR、MC）以及可视化指示。保留一个可滚动的计算历史记录，支持清除或保存。实现完整的键盘支持，包含合适的按键映射和快捷键。针对除以零、无效运算以及溢出等情况，加入健壮的错误处理，并提供有用的错误提示信息。设计响应式布局，能够根据屏幕尺寸或方向在标准型和科学型布局之间自动切换。提供多种主题选项（经典、现代、高对比度）。为按键添加可选的声音反馈，并支持音量调节。实现结果和表达式的复制/粘贴功能。