Problem with dosbox

[Arbus]

Hello friends,

I am having a trouble with dosbox 0.72. I opened turbo c++ using dosbox and tried a program.
But it throws an error 'unable to create hello.obj'.
my program

#include<iostream.h>
#include<conio.h>
void main()
{
 cout<<"hello";
}

I gave this while opening turbo c++ in dosbox...
Z:\>mount c d:\turboc3\
Z:\>c:
C:\>tc.exe

Thanks in advance.