ps2键盘编码库文件，直接可以调用。先把它复制进编译器的库文件，家#include<ps2.h >-ps2 keyboard encoding library file directly can call. First copy it into the compiler

proteus计算器仿真，c语言编程，4*4键盘编码，lcd显示-proteus calculator simulation, c language programming, 4* 4 keypad code, lcd display

从键盘输入若干字符及每个字符出现的频率，将字符出现的频率作为结点的权值，建立哈夫曼树，然后对各个字符进行哈夫曼编码，最后打印输出字符及对应的哈夫曼编码。-From the keyboard characters and each character appear frequency, the frequency as characters of weights, build node tree, then hoffmann for each character coding hoffmann l

编译原理实验一词法分析的具体实现，键盘输入字符，可得到对应的字符编码-Compilation Principle Analysis of the specific experimental realization of the word, the corresponding keyboard character available character encoding