As the source is collected by the Internet (former English), there may be a litt...

代码说明：

由于源码是由网上收集的(原英文)，可能会有少许未能完善之处。但经过测试，大部分基本的运算还是可以的，当然包括常用的函数（三角函数、反三角函数、双曲三角函数、绝对值.......），甚至是一些复杂无比的表达式也能计算，如：ln e + rnd(2) + 3(2)4 * (log(tan (itan 1))) 等。值得一提的是，它还有函数绘图、数据统计和自定义常数等功能。另外，程序经过我汉化（仅在界面上），更易懂。 -As the source is collected by the Internet (former English), there may be a little failure to perfect. However, after testing, the majority of basic computing can, of course, including the commonly used functions (trigonometric functions,反三角函数, hyperbolic trigonometric functions, absolute value and even some .......), infinitely more complex expression can be calculated, such as: ln e+ rnd (2)+ 3 (2) 4* (log (tan (itan 1))) and so on. It is worth mentioning that, it also function mapping, data and custom constants and other functions. In addition, the procedures after I finished (only in the interface), more easy to understand.