1) Write a program that accepts user input a string, statistics which appeared in all the characters, their frequency of occurrence in descending order of output. (Note: the use of such method of preparation, the use of a stored list of characters appeared, the linked list data field of each node has two variables, a storage of the character, a number of characters stored in each retrieved original string of one character, the first in the list to find, if it finds this character, it is the number of occurrences plus l, or create a new node in the list at the end of the link.) 2) have already been carried out to establish a good list handled as follows: Delete occurrences of characters is less than 3 nodes, and outputs the list after deletion of information.

统计字符串.txt

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