#include <stdio.h>
#include <stdlib.h>
#pragma pack(1)

typedef struct {
    char         floor;
    unsigned int number;
} Room;

int main(int argc, char* argv[]) {
    // Open file
    const char* filename = "b.binary";
    FILE* fp = fopen(filename, "r");
    if(fp == NULL) {
        fprintf(stderr, "Could not open %s\n", filename);
        return EXIT_FAILURE;
    }

    // Read Room from file
    Room room;  // will be initialized by fread(…)
    fread(&room, sizeof(room), 1, fp);
    // fread(&room, 5, 1, fp);  // ← BAD!!! DO NOT DO THIS
    // size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);

    fclose(fp);
    
    printf("This is what we READ from %s\n", filename);
    printf("{ .floor = '%c', .number = %d }\n", room.floor, room.number);

    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */