nested-type-alignment-c

main.c

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

struct CStruct {
    int16_t a;	// 2 bytes
    int32_t b;	// 4 bytes
    int16_t c;	// 2 bytes
    int32_t d;	// 4 bytes
};

int main() {
    puts("C struct:\n");
    printf("  offset of a: %2ld bytes\n", offsetof(struct CStruct, a));
    printf("  offset of b: %2ld bytes\n", offsetof(struct CStruct, b));
    printf("  offset of c: %2ld bytes\n", offsetof(struct CStruct, c));
    printf("  offset of d: %2ld bytes\n", offsetof(struct CStruct, d));
    printf("  total size:  %2ld bytes\n", sizeof(struct CStruct));
    return 0;
}