Hey guys,

Im trying to open a file based on a variable, HERES what i got.

...
#include

int main()
{
fstream file;
string FILENAME;

cout << "enter file name:" << endl;
cin >> fileName;

file.open(fileName);

}

this doesnt work for some reason, debug error =

error C2664: 'void std::basic_ifstream<_Elem,_Traits>::open(const wchar_t *,std::ios_base::openmode,int)' : cannot convert parameter 1 from 'std::string' to 'const wchar_t *'


any help will be great )))

thanks!I get two errors:


Error1error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)

and

Error2error C2664: 'void std::basic_ofstream<_Elem,_Traits>::open(const wchar_t *,std::ios_base::openmode,int)' : cannot convert parameter 1 from 'std::string' to 'const wchar_t *'


But I fixed it...


Code: [Select]#include <fstream>
#include <iostream>
using NAMESPACE std;
int main()
{
OFSTREAM outfile;
string fileName;
cout << "enter file name:" << endl;
fileName.resize(240);
cin >> &fileName[0];

outfile.open(&fileName[0]);
outfile << "This file contains data.";
outfile.close();
}

I don't know if the iostream/fstream libraries allow you to read/write the string class directly... but I didn't want to look that up, so I just went with what I knew.

Basically- instead of trying to pass the class instance to the open() method I PASSED the address of the first character; since this is null delimited the method knows how to read it and is able to open the file. Same story with the cin<< acquisition; just passed it the address of the first character- after allocating with resize(), that is.
BC_Programmer, you are the greatest! works perfect