Write a program in C++ that counts the number of characters in a text file. Prompt me to enter the name of the file. Count the number of A's, B's, and so on. A lower case letter is to be treated as if it were in upper case - in other words, an 'a' is the same as an 'A'. Format your output such that it shows me how many of each character you counted. For example: A's = 23 (note, this is both 'A' and 'a') B's = 13