Please use C++

1. Objective Your goal is to write a program that determines if a string has all unique lowercase letters. 2. Problem The string will be read as a command line argument to the program. The program will then check if t string has a owercase letters. If it does not, the program will display an error message and exit. Otherwise, the program will determine whether or not the string has all unique lowercase characters Case 1: No input arguments Print usage message $ ./unique Usage: ./unique Case 2: Too many input arguments Print usage message $./unique too many words Usage: ./unique Case 3: Bad input $ ./unique HI Error: String must contain only lowercase letters. Case 4: Bad input $. . /unique 1234567890 Error: String must contain only lowercase letters. Case 5: Unique $ ./unique abcdefghijklmnopqrstuvwxyz All letters are unique. Case 6: Duplicates $ ./unique longstring Duplicate letters found 3. Hint When a letter is seen, check if the corresponding bit is equal to 1. If it is, the letter has already been seen and must be a duplicate. Otherwise, change the corresponding bit from 0 to 1