How to give input file?

[Ihtisham]

hey guys i wana know how to give an input file to a program? and get back an output file...?
thanks

[Browni3141]

What do you mean? Will the program prompt the user for the name of a file?

[Ihtisham]

yes or the name of file is given in the program by using fstream.....

[moorecm]

http://cplusplus.com/articles/how_to_ask/

[Browni3141]

Here's an example:

std::string infilename;
std::cin >> infilename;
std::ifstream infile(infilename);//open file with the name infilename