#include <stdio.h>
#define MAXL 256

int main()
{ FILE *fin, *fout;
  char line[MAXL];
  fin = fopen( "original.txt", "r" );
  fout = fopen( "copia.txt", "w" );
  if( fin == NULL || fout == NULL )
     printf("Erro na leitura dos ficheiros.");
  while( fgets(line, MAXL, fin) != NULL ){
	int i;
	for (i= 0; i<strlen(line); i++){
		if ((line[i]>= 'a') && (line[i]<= 'b'))
			line[i]= line[i]-32; 
	}
	fputs(line, fout);
  }
 fclose(fin);
 fclose(fout);
 return 0;
}