How can i automatically assign file name according to user's inputted name?

Question

i am trying to create a program in which number of users inout their name and i want to create a file with the user's name each time. For instance, someone input their name as albert now i wanna create a filename albert.dat without knowing his name.

Answer 1

store the name in a variable and pass it to file.open(var + ". dat") ;