#include <stdio.h>

int main(){
  FILE *arq;
  double aux=21349230423.500000;
  double aux2=0;

  arq = fopen("teste.bin", "w+b");
  fwrite(&aux, sizeof(double), 1, arq);

  rewind(arq);
  fread(&aux2, sizeof(double), 1, arq);
  printf("Conteudo de aux2: %lf \n", aux2);


  fclose(arq);

}