c++

void process_line(map& m, string line, size_t n) :

calls clean_string to clean up the provided string argument

o calls generate_ngrams on the string (n is provided as an argument)

o records the frequency of the ngrams in the argument map reference

input:

4 3 this thin thing!! 

output

hin:2, his:1, ing:1, int:1, ist:1, nth:1, sth:1, thi:3