To Encoding Format of File

Hi All,
I have wriiten a c++ code which reads different encoding format file and store in another file.But when i do any manipulation on the file,the following code does not working.
Can anybody give me the right code.Its urgent!!!!

Code:

#include <stdio.h>
#include<iostream>
int main()
{
    FILE *fp, *fw;
    wchar_t *buffer;
    
    if((buffer=(wchar_t *)malloc(sizeof(wchar_t))) == NULL) /* It checks the buffer for the availability of space ,
    to avoid the problem arise due to data overflow */
    {                                                            
        printf("Error: No enough memory\n");
        getchar();
        return 1;
    }
    else
    {
        fp = fopen("in2.txt","rb"); 
        fw = fopen("output_untitled.txt","wb");
    
        if ( fp == NULL  || fw == NULL)
        {
          printf("Error: File cannot be opened\n");
          getchar();
          return 1;
        }
        else
        {
            while(fread(buffer,sizeof(wchar_t),1,fp) > 0)
               fwrite(buffer,sizeof(wchar_t),1,fw);
        }
    }
    getchar();
    return 0;
}

Thanx in Advance
Samir

What does "does not working" mean in this context? How are we supposed to know what errors you are experiencing?

Your program appears to copy the file "in2.txt" to the file "output_untitled.txt". Apart from not deallocating memory or closing files, I see nothing wrong with it. What exactly is the problem?