Consider a file that contains student grades such as the following:

Jane Lee $100$

Aaron $x.$ Schmidt $37$

Frank von Tardy $2$

$.$

As with the country names, the student names don't have a fixed number of words. To process the input, read one line of input at a time from the given input stream in$,$ then process that line with an istringstream object. If a word starts with a digit, store in grade. Otherwise, add each word to the name.

How to use this tool $v$