根据实际需要输入信源个数和各个信源符号以及概率，进行三进制哈弗曼编码。编码结束后，输出编码结果，并计算平均码长、信息率、编码效率并判断是否满足克拉夫特不等式和变长编码定理。-Need to enter the actual number of sources and each source symbol and the probability of a three-band Ha Fuman code. After encoding, the output coding results, and calculate the average code length, information rate, coding efficiency and to determine whether to meet the Kraft inequality and variable length coding theorem.