#include <stdio.h>

union int_and_float_u {
  int i;
  float f;
};
typedef union int_and_float_u int_and_float;

struct four_chars {
  char a, b, c, d;
};

union int_and_chars_u {
  int i;
  struct four_chars c;
};
typedef union int_and_chars_u int_and_chars;

int main(int argc, char** argv) {
  int_and_float mixed;
  mixed.f = 17.0;
  printf("Float: %f\nInteger: %d\n\n", mixed.i, mixed.f);

  int_and_chars chars;
  chars.c.a = 'a';
  chars.c.b = 'b';
  chars.c.c = 'c';
  chars.c.d = 'd';
  printf(
    "Characters: '%c%c%c%c'\nInteger: %d\n\n",
    chars.c.a, chars.c.b, chars.c.c, chars.c.d,
    chars.i
  );

  chars.c.a = 'a';
  chars.c.b = '\0';
  chars.c.c = '\0';
  chars.c.d = '\0';
  printf(
    "Characters: '%c%c%c%c'\nInteger: %d\n\n",
    chars.c.a, chars.c.b, chars.c.c, chars.c.d,
    chars.i
  );
}