save files with different names

[over the top]

i can't find any better place to get a clear answer to my q?
i have just make some programs in c++ but:

1- i want every user of the programe when he entered his values for calculation
to write any name he want and this name become the .txt file for his own.

2-how to make another file with .exe to display it with his previously entered values if he want to modify any input data for new claculation.

[Bazzy]

1. You can use strings:

std::string name;
std::getline ( std::cin, name );
name += ".txt";
std::ofstream file ( name.c_str() ); // open file called  (user name).txt 

2. Open the same file that you used to save data in