同诸多网友一样，受益于VCKBASE，觉得应为他做点贡献了，于是做了这么一个基于表达式求值的科学计算器与各位爱好编程的朋友分享。

　　如您所知，这方面的程序很多，看过ZF.Yi的相关作品，也见过黄江峰的相关程序，但我觉得我的计算类有不同于二位的特色，如计算结果的有效位较长（16位）；支持不严格的表达式输入（如cos(23)*sin(34)与cos(23)*sin(34与cos23*sin34等价）；支持四种进制的数在一个表达式中同时出现的进制混合运算（除十进制外的各进制数不限于整数，如12d.3axh，xh是我的计算类所能识别的十六进制数的标识符）；且程序做得也比较精细（如制作了鼠标键盘、窗口跟随、计算历史查看等），这才使我觉得拙作不致于滥竽充数，相信网友们看了会另有收获的。-with many netizens, benefited from VCKBASE, think he should Zuodiangongxian. So do so based on a formula that evaluates the scientific calculator with you-loving friends to share programming. As you know, many of the procedures, ZF.Yi read the relevant works have seen Huang Jiang-related procedures, But I think I kind of calculation is different from the two characteristics, such as the results of a longer-effective (16); support rigorous expression input (such as cos (23)* sin (34) cos (23)* sin (34 with the equivalent sin34 cos23*); supports four 229 in a few expressions while the 229 mixed Operators (except outside the decimal 229 is not limited to a few Integer, 12 d.3axh, the exposure is calculated effort to identify the type hexadecimal number identifier); and procedures done rela