examples/OCaml-Kaleidoscope/Chapter7/bindings.c

#include <stdio.h>

/* putchard - putchar that takes a double and returns 0. */
extern double putchard(double X) {
  putchar((char)X);
  return 0;
}

/* printd - printf that takes a double prints it as "%f\n", returning 0. */
extern double printd(double X) {
  printf("%f\n", X);
  return 0;
}