Updating my cellphone bill program

[Ralphus629]

I have this program that calculates and prints a cell phone bill. I've been stuck at how to approach this task. How would I update the program to prompt the user to enter the name of an input file (using a string type only) and the name of an output file that opens the files with the name.c_str() function? Any help would be greatly appreciated!

[Computergeek01]

This is all in the order in which you do things, you would prompt the user for the file names early on in the program and save that data to a pair of strings. You would then use these strings to open the fstream objects. You use the "c_str()" member function to convert the string into a char* object that the fstream objects can use to open the files.