Introduction - If you have any usage issues, please Google them yourself
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.