#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

// UNION

union Value {
    int   as_int;    //   4 bytes (on our platform)
    float as_float;  //   4 bytes (on our platform)
};                   //   4 bytes (on our platform) for a 'union Value' object
//  could have done typedef union { ... } Value;

int main(int argc, char* argv[]) {
    union Value n = { .as_int = 5 };
    // Declare 'union Value' object and set the .as_int field.

    printf("n.as_int == %d\n", n.as_int);

    n.as_float = 3.1415;
    printf("n.as_float == %.4f\n", n.as_float);

    printf("n.as_int == %d  // WRONG!!!\n", n.as_int);

    union Value n_do_not_do_this = { .as_int = 7, .as_float = 4.2526 };
    printf("n_do_not_do_this.as_int == %d\n", n_do_not_do_this.as_int);
    printf("n_do_not_do_this.as_float == %.4f\n", n_do_not_do_this.as_float);

    return EXIT_SUCCESS;
}
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