用C/C++设计一个简单行编辑处理器，实现其最基本的功能:

（1）该行编辑器不超过10行，每行以回车结束

（2）数据以文件形式储存；从键盘输入数据，建立并保存为磁盘数据文件edit.txt

（3）字符的输入，修改；

（4）符号串的查找，替换； -Using C/C++ to design a simple line editor processor, to achieve its most basic functions: (1) the line editor does not exceed 10 lines, each line in order to enter the end　(2) data to document the form of storage　from keyboard input data, set up and save it as a disk data file edit.txt　(3) characters of the input, modified　(4) symbols of the search string, replacement