Struct Padding

Code

#include <stdio.h>
#include <stddef.h>

#define offset(type, member) ((size_t)&(((type*)0)->member))
typedef struct {
    char a;
    int b;
    short c;
} MyStruct;

void print_offsets() {
    // printf ("Offset of a: %lu\n",offsetof(MyStruct, a));
    // printf ("Offset of b: %lu\n",offsetof(MyStruct, b));
    // printf ("Offset of c: %lu\n",offsetof(MyStruct, c));

    printf ("Offset of a: %lu\n",offset(MyStruct, a));
    printf ("Offset of b: %lu\n",offset(MyStruct, b));
    printf ("Offset of c: %lu\n",offset(MyStruct, c));
    printf ("Size: %lu\n",sizeof(MyStruct));
}

int main() {
    print_offsets();
    return 0;
}

Solving Approach