流程控制学习程序，包括多层嵌套的IF-ELSE语句实例、正整数分解质因数、判断素数等-Process control learning process, including multiple nested IF-ELSE statements instance, a positive integer prime factor decomposition to determine prime numbers, etc.

电梯模拟程序，2个电梯，6层楼，分别用2个线程控制电梯的速度，用主线程控制界面显示-Elevator simulation program, 2 lifts, 6 floors, each with two threads control the speed of the elevator, with the main thread control interface display

实现TCP数据链路层的传输,有差错控制功能,在VC6下开发-TCP data link layer of transmission, error control function, under VC6 development