Write a C++ program that reads characters from a text file. The program changes each letter by the next
letter in the Alphabet. For example, the lower-case letter ‘a’ is changed ‘b’; ‘b’to ‘c’; ……. , and ‘z’ to
‘a’. Similarly, for upper-case letters, ‘A’ is changed to ‘B’, ‘B’ to ‘C’; ……, and ‘Z’ to ‘A’. Digits and
special characters in the text are left unchanged. The program also determines the number of
occurrences of the alphabetic letters and the number of occurrences of digits “0” to ‘9’ in the input text.

Write a C++ program

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