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

#pragma pack(1)  // tells compiler not to add padding to struct object fields.

typedef struct {
    char label; // 1 byte  for a char, on our platform
    int x;      // 4 bytes for an int, on our platform
    int y;      // 4 bytes for an int, on our platform
} Point;

int main(int argc, char* argv[]) {
    Point p = { .label = 'A', .x = 5, .y = 7 };
    printf("sizeof(p) == %zd\n", sizeof(p));
    // Reports 9 bytes because we have #pragma pack(1), so compiler does NOT add
    // padding to struct object fields.

    return EXIT_SUCCESS;
}
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