Description: Interface function is very beautiful, oh-wide 4. Use a static array (or list) to address book management, each array element is the type of structure, through this example to understand the basic functions of database management, focusing on the array elements to master the structure of applications, an array of function parameters to sit, document reading write, custom function, such as knowledge, here mainly include input, display, search, delete, insert, save, read, sorting and other functions
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