#include <stdio.h>
int main()
{
struct A{
char a;
int b;
long c;
double d;
};
struct B{
char a;
char b;
char c;
char d;
char f;
int e;
};
struct C{
double a;
char b;
int c;
long d;
};
int sizeA = sizeof(struct A);
int sizeB = sizeof(struct B);
int sizeC = sizeof(struct C);
printf("sizeA=%d\nsizeB=%d\nsizeC=%d\n",sizeA,sizeB,sizeC);
printf("sizeof(unsigned)=%d\n",sizeof(short int));
printf("%d,%d,%d\n",(unsigned long)(&((struct B *)0)->b),(unsigned long)(&((struct B *)0)->c),(unsigned long)(&((struct B *)0)->d)); //这里打印的是偏移量；
return 0;
}
运行一下代码稍微分析一下就知道怎么回事了，这里不述。
另附：
struct sa
{
char a;
int b;
short c;
double d;
};
struct sb
{
double a;
int b;
short c;
char d;
};
//答案：24，16
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