Write the following fucntions and test then in the main without using library or pointer. using only namespace std, and include find_first_of, and find_first_not_of.
Instead of finding the first occurrence of an exact string (as find does), find_first_of finds the first occurrence of any of the characters included in a specified string. findfirstof( source cstring, character set, starting pos=0);
//first occurrence of any of the characters in character set in source find_first_not_of finds the first occurrence of a character that is not any of the characters included in the specified string. findfirstnotof(source cstring, character set, starting pos=0);
//first occurrence of any characters in source not in he characters in character set.