Please use C++ to code and strictly follow the comment below:

Exercise P10.10. Implement a function vector generate substrings(string s) that generates all substrings of a string. For example, the substrings of the string "rum" are the seven strings , ru rum", Hint: First enumerate all substrings that start with the first character. There are n of them if the string has length n. Then enumerate the substrings of the string that you obtain by removing the first character