output file streams

i wrote this program, but it doesn't work. it keeps giving me the error "test_file not recognized". i have a floppy disk in my computer when i run this program. i thought that if there is no file by the name that you specify (in this case test_file), the computer makes one. this didn't happen, so i made a blank file called "test file" on my floppy disk, but even then, it didn't work.
check it out.....

#include <iostream.h>
#include <conio.h>
#include <fstream.h>
#include <assert.h>
#include <STDIO.h>

//LEVEL ONE FUNCTION PROTOTYPES///////////////////////////////////////////
void SaveToDisk(ofstream &neil);


int main()
{
clrscr();
ofstream neil;

SaveToDisk(neil);

neil.close();

getch();
return 0;
}

void SaveToDisk(ofstream &neil)
{
neil.open(test_file.c_str());
assert(! neil.fail());
neil<<1234<<endl;
}

you haven't declared a test_file variable. if you just want a file called test_file to open:

Code:

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neil.open("test_file.txt");

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