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

union Number {
    int as_int;
    double as_double;
    char as_char;
};

void print_number(union Number n, int which) {  // BAD!  use better way (TBA)
    if(which == 1) {  // BAD: do not embed integers as magic numbers
        printf("%d\n", n.as_int);
    }
    else if(which == 2) {  // BAD: do not embed integers as magic numbers
        printf("%f\n", n.as_double);
    }
    else if(which == 3) {  // BAD: do not embed integers as magic numbers
        printf("'%c'\n", n.as_char);
    }
}
int main(int argc, char* argv[]) {
    union Number n = { .as_double = 3.1415962 };
    print_number(n, 2); // BAD: do not embed integers as magic numbers
    return EXIT_SUCCESS;
}

// double is like a float but twice the precision

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