Delphi字符串截取函数和源代码，截取字符串，提取串为空串。字符串处理不管是在Delphi或是在其它的编程语言中，都是应该掌握的基础编程技巧，有必要掌握。-Delphi string function interception and source code, the interception of a string, extract the string to the empty string. String handling in Delphi or other programming languages, should master basic programming skills, it is necessary to grasp.