2024年1月7日发(作者:)
#include
main()
{
struct A {
int a;
char b;
short c;
};
struct B {
char b;
int a;
short c;
};
#pragma pack (2) /*指定按2字节对齐*/
struct C {
char b;
int a;
short c;
};
#pragma pack () /*取消指定对齐,恢复缺省对齐*/
#pragma pack (1) /*指定按1字节对齐*/
struct D {
char b;
int a;
short c;
};
#pragma pack ()/*取消指定对齐,恢复缺省对齐*/
int s1=sizeof(struct A);
int s2=sizeof(struct B);
int s3=sizeof(struct C);
int s4=sizeof(struct D);
printf("%dn",s1);
printf("%dn",s2);
printf("%dn",s3);
printf("%dn",s4);
}
输出:81287
修改代码:struct A { // int a; char b; short c;};
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