interface uses windows,SysUtils,math; function qbdsz(s:string):double; //取表达式值 implementation var x:array of double; //实数范围可以更改 y:array of string; max:integer; pai,e:double; function qz(s:string):double; //将没有括号的表达式求值 var t:integer; s1:string; begin
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博文链接：https://hwhuang.iteye.com/blog/554177二一
RULES AND LIMITATIONS
Bind variables of a SQL statement are identified by their names.
When binding a value to a hind variable, the string identifying
the bind variable in the statement may optionally
