包含五个C源码，分别是：IP地址解析、二叉树算法集、广度优先搜索及深度优先搜索、华氏温度和摄氏温度的相互转换、用for循环模拟自由落体运动。-Contains five C source code, namely: IP address resolution, binary tree algorithm set, breadth-first search and depth-first search, Fahrenheit and Celsius temperature of one another, with the for loop simulation of free fall.