(c++) Prompt user to enter a file name (can assme it is alwaysgoing to be example.txt). For each word in that file, spelling willbe checked, excluding any punctuation marks at the end and alsoconverting a first letter that is uppercase to a lowercase exceptfor the word “I”. The input file, example.txt will be preserved andprinted to the console with astericks* surrounding the mispelledwords. The valid spelling of a word, other than “I,” will be eitherspelling beginning with a lowercase letter or the spellingbeginning with an uppercase letter. For example: “Rice” and “rice”are valid but “rICE” is not.
Use unordered_set under <unordered_set>
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