#include <stdio.h>

int main(int argc, char** argv) {
  FILE* fp = fopen("foo.raw", "w");
  char csum = 27;
  fwrite(&csum, sizeof(char), 1, fp);
  double fsum = -27.2727;
  fwrite(&fsum, sizeof(double), 1, fp);
  short int isum = -2727;
  fwrite(&isum, sizeof(short int), 1, fp);
  fclose(fp);
}