#include <stdio.h>
#include <stdlib.h>
int main( void )
{
        FILE *fpin;
        FILE *fpout;
        int inch;
        fpin = fopen( "abc.txt", "r" );
        fpout = fopen( "mmm.txt", "w" );
        if ( fpin == NULL || fpout == NULL )
                exit( 1 );
        while ( ( inch = getc( fpin ) ) != EOF )
            putc( inch, fpout );
        fclose( fpin );
        fclose( fpout );
}