含有运行结果哦~功能齐全而且是优化版

文件操作设计及实现

总体设计：设计实现对文件 file.txt的读取，插入和增加的功能；

要求： （1）实现对文件中的整行读取和写入(不可用fscanf，fprintf函数，只可以fread和fwrite)

（2）实现文件中间插入一段话--------这是一个测试；

（3）实现对文件的创建，文件写入和添加；

-Contains the results oh fully functional and optimized version

Design and Implementation of file operations

The overall design: design the file file.txt read, insert, and increased functionality

Requirements: (1) implementation of the entire line of the file reads and writes (unavailable fscanf, fprintf function can only fread and fwrite)

(2) File intervening passage-------- This is a test

(3) implementation of file creation, file write and add