Question: In C++, Given: string ALNUM = ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 Write a function that returns a new string. New string is the input string, followed by a new
In C++,
Given: string ALNUM = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
Write a function that returns a new string. New string is the input string, followed by a new alphanumerical list with characters already in the input string removed.
Ex1: input string = "POLYBIUS". Output: "POLYBIUSACDEFGHJKMNQRTVWXZ0123456789"
Ex2: input string = "HI". Output: "HIABCDEFGJKLMNOPQRSTUVWXYZ0123456789"
Input string never contains duplicates and is always a letter/number.
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