从文本文件中读入90个百分制的分数，按如下分段：0~39、40~49、50～59、60～69、70～79、80～89、90～100统计，并输出各分数段分数的个数以及各段分数个数占总个数的百分比。文件中的分数之间用逗号隔开如：78,90,92,85,88,87,87,73,75,81,86-Reading from a text file into the system 90 percent of the score, by the following subparagraph: 0 ~ 49,50 ~ 39,40 ~ 59,60 ~ 79,80 ~ 69,70 ~ 89,90 ~ 100 statistics, and the output of the Score Score the number of paragraphs as well as the number of scores above the percentage of the total number. Between the scores of documents separated by commas such as: 78,90,92,85,88,87,87,73,75,81,86