该程序由键盘输入一个符合上述约定的文本文件名和一个单词，计算该单词在该文件中出现的次数，并输出包含该单词的所有句子（按句子在文件中的先后次序，依次输出）。-the program by a keyboard above the agreed text file name and a word, the calculation of the word in the document the number of occurrences output and contains all the words of the sentence (by the sentence in the document in the order, followed by output).