qfedu-c-level/day13/d3.c

#include <stdio.h>
#pragma pack(1) // 手动指定内存对齐，优点：可以减少内存的浪费，缺点：会降低内存的读取速度
struct
{
    char a;
    short b;
    int c;
} p1;

int main()
{
    printf("p1 size: %lu B\n", sizeof(p1));
    printf("%p %p %p\n", &p1.a, &p1.b, &p1.c);
    return 0;
}