首页 struct Info { uint8_t a; uint32_t b; uint8_t c; } ONEBYTE_ALIGN; #if defined(__GNUC__) || defined(__GNUG__) #undef ONEBYTE_ALIGN #elif defined(_MSC_VER) #pragma pack(pop) #undef ONEBYTE_ALIGN #endif std::cout << sizeof(Info) << std::endl; // 6 1 + 4 + 1 std::cout << alignof(Info) << std::endl; // 1 @阿秀: 代码已成功复制到剪贴板

struct Info { uint8_t a; uint32_t b; uint8_t c; } ONEBYTE_ALIGN; #if defined(GNUC) || defined(GNUG) #undef ONEBYTE_ALIGN #elif defined(_MSC_VER) #pragma pack(pop) #undef ONEBYTE_ALIGN #endif std::cout << sizeof(Info) << std::endl; // 6 1 + 4 + 1 std::cout << alignof(Info) << std::endl; // 1 @阿秀: 代码已成功复制到剪贴板

时间: 2023-05-26 17:01:59 浏览: 110

C实现与 uint64_t 相同功能的类

实现与 uint64_t 相同的类，如果平台不支持 uint64_t 的话，可以代替之。目前只完成部分功能，其他功能敬请期待。 uint64.hpp #include <endian> #include <cstdint> #include <type> #include <array> #define MC_BEGIN_NAMESPACE namespace mc { #define MC_END_NAMESPACE } MC_BEGIN_NAMESPACE #if __BYTE_ORDER == __BIG_ENDIAN struct maybe_big_endian

这是一个用于定义结构体的代码，结构体名为Info。其中包含三个变量，分别是一个8位的无符号整数a，一个32位的无符号整数b和一个8位的无符号整数c。ONEBYTE_ALIGN是一个宏定义，表示这个结构体的对齐方式为1字节对齐。

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struct avtp_stream_pdu { uint32_t subtype_data; uint64_t stream_id; uint32_t avtp_time; uint32_t format_specific; uint32_t packet_info; uint8_t avtp_payload[0]; } attribute ((packed));