I need help with number 20. C++ Ill include the code that we are suppose to modify. After coding the new program. What am I expecting in the console?

In this exercise, you are to modify the Classify Numbers programming example in this chapter. As written, the program inputs the data from the standard input device (keyboard) and outputs the results on the 20. standard output device (Sscreen). The program can process only 20 num- bers. Rewrite the program to incorporate the following requirements: a. Data to the program is input from a file of an unspecified length that is, the program does not know in advance how many numbens are in the file