C语言实现设计一个简易的手机通讯录管理系统。该题目要求在熟练掌握C语言的基本知识：数据类型（整形、实型、字符型、指针、数组、结构等）；运算类型（算术运算、逻辑运算、自增自减运算、赋值运算等）；程序结构（顺序结构、判断选择结构、循环结构）；大程序的功能分解方法（即函数的使用）等。进一步掌握各种函数的应用，包括时间函数、、绘图函数，以及文件的读写操作等。-Design a simple mobile phone address book management system. The subject is required to master the basic knowledge of C language: data types (plastic, real, character, pointers, arrays, structures, etc.)　operator type (arithmetic, logical operators, increment decrement assignment operator)　 program structure (structure of the order, judgment to select a structure, loop structure)　functional decomposition of large programs (ie, the function used). To further understand the application of a variety of functions, including a function of time, drawing functions, as well as file read and write operation.