未完成，不知道哪里出了问题，可编译，可是有使用效果，过程需加载头文件和lib库-Not completed, do not know what went wrong can be compiled, but the effects are used, the process required to load the header files and lib library

字符截取，不包含首部，尾部 转换为数字, 输入： *src (原字符串数数组)， *MatchFirst(需截取字符首部)，*MatchTail(截取字符的尾部) 输出： *dest -Character cutout, does not include the header, tail converted into digital