#include <stdio.h>

int main(){
  FILE *arq;
  double aux[]={2.5, 1.4, 3.6};
  double aux2[3];
  int i;

  arq = fopen("teste.bin", "w+b");
  fwrite(aux, sizeof(double), 3, arq);

  rewind(arq);
  
  for(i=0; fread(&aux2[i], sizeof(double), 1, arq) != 0; i++)
    ;

  for(i=0; i<3; i++)
    printf("Conteudo de aux2[%d]: %lf\n", i, aux2[i]);

  fclose(arq);

}