[發錢] BTC

[gR7P4zXH (tpn7gpdx)]

在 8 位元 Motorola 6809 處理器上，有道指令叫做 SEX，寓意是 “Sign EXtend”

SEX 123 應該輸出 0, 而 SEX -3 要輸出 0xffffffff (取決於有效位數)
考慮一個 32 位元版本的 SEX 實作如下，假設執行環境是 little-endian:

#include <stdint.h>
static inline uint32_t sex32(int32_t x) {
    union {
        TYPE w;
        struct { uint32_t lo, hi; };
    } z = {.w = x};
    return z.hi;
}

試問: TYPE=?

第一個留下正確答案和地址的推文贈20000 satoshi


Answer:
uint64_t或int64_t
lilian0111 & akuei1031 各解出一半，得 10000 satashi

TXID
b153cdf0174f82ec9b7f0eb699e814f4d6b565dbfbb936cbbdb971dd34ebec00

--
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※ 文章網址: https://www.ptt.cc/bbs/DigiCurrency/M.1571414492.A.61F.html
推 roger: int32_t
→ roger: 1DuB4FPbqQPLAMDVuBjxFRgSGwRo4uN8DB
推 TimWater: 等下大家都在出題發錢了嗎xd
--------------------
推 lilian0111: int64_t
→ lilian0111: 3LuUjqSZuvBrxH53L2nVPhvVfk5n57cXyt
--------------------
推 k3588140: int_64t
→ k3588140: 1Cpqc6M49mMy3krhrQzv4SWcRH2otQFesD
推 george126: int_32t
→ george126: 39Hhc4uAG3HDSJz2cEGsQweSUEfciRrG7Y
→ dennisxkimo: int32_t 1FsQ8UnHsYAfzutCKTkt6tLAzsWmoEkqeW
--------------------
→ akuei1031: uint64_t
→ akuei1031: 3QX6ZiHxT6o5r6DEKnsFUXsMBWAUDUwTrU
--------------------
推 SRNOB: format c:
推 mongala: int64_t
→ mongala: 1EHtAaiS6EMR3oFnHHeTarmc97fq9A8tio
推 AppMaker: uint32_t
推 akuei1031: uint64_t
→ akuei1031: 3QX6ZiHxT6o5r6DEKnsFUXsMBWAUDUwTrU
推 akuei1031: 突然發現前幾天按錯沒推到趕快補推QQ
推 dennisxkimo: int32_t 1FsQ8UnHsYAfzutCKTkt6tLAzsWmoEkqeW
推 AcousticLove: int32_t 3LX8YG2TE2bjuBSaoU7Npd9dTi1RtxZx5g
※ 編輯: gR7P4zXH (140.115.52.18 臺灣), 10/24/2019 01:25:17
→ akuei1031: 感謝老闆