Lendo do arquivo, em C.

binread.c

#include <stdio.h>   

int main(int argc, char **argv) {
   FILE *file;
   int i;
   double d;
   file = fopen("teste.bin","rb");
   fread(&i,sizeof(int),1,file);
   fread(&d,sizeof(double),1,file);
   printf("%d\n %#f\n",i,d);
   fclose(file);
}