Write a program in C++ to read a large piece of text from the user (multiple lines) until the user inputs EOF. Assume the input only contains alphabets, numbers, commas and periods. The program should first compute the number of occurrences of each character in the input. Next, the program displays a sorted list (in descending order) of each character and the corresponding number of occurrences of that character. The sorting should be performed on the counts and not the characters.