Open file from user input?

using fstream, i can't seem to open a file from user input

for example i cin a string from the user and try infile.open("A:" + string) but that doesn't work, can someone tell me how to do this? that's the last thing i need to finish my school project

Post the code you have so far.

>i cin a string from the user and try infile.open("A:" + string) but that doesn't work
If your string is a C-style string then there's no way that will work. You need to do something like this:

Code:

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char *filename = new char[strlen ( string ) + 3];
strcpy ( filename, "A:" );
strcat ( filename, string );
infile.open ( filename );
delete filename;

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If your string is a C++ string then things are much easier (if slightly more obscure):

Code:

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infile.open ( ("A:" + string).c_str() );

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