Struct Padding

Code

#include <stdio.h>

typedef struct {
    char a;
    int b;
    short c;
} MyStruct;

void print_offsets() {
     MyStruct obj;

//%z → modifier meaning “this matches a size_t”
//u → unsigned decimal integer

     printf("Offset of a: %zu\n", (char*)&(obj.a)- (char*)&obj);

     printf("Offset of b: %zu\n", (char*)&(obj.b) - (char*)&obj);

     printf("Offset of c: %zu\n", (char*)&(obj.c) - (char*)&obj);

     printf("Size: %zu\n", sizeof(MyStruct));
}

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

Solving Approach