-- #include "stdint.h"

　　// 注：以上内容没有前面的“--”，做时去掉即可

　　int encode(const void* raw_in, void* raw_out, uint32_t password, size_t len)

　　{

　　const uint8_t* in = (const uint8_t*)raw_in;

　　uint8_t* out = (uint8_t*)raw_out;

　　uint32_t seed = password ^ 0x42381238u;

　　for (size_t i = 0 ; i < len; ++i) {

　　uint8_t a = ( in[i] ^ seed ) >> 2;

　　uint8_t b = ( ( ((uint32_t)in[i]) << 10 ) ^ seed ) >> (10-6);

　　a &= 63;

　　b &= 192;

　　a = 63 & ( a ^ (b << 3));

　　out[i] = a | b;

　　seed = (((seed << 7) ^ seed ^ in[i]) + 48475829);

　　}

　　return 0;

　　}

　　int decode(const void* raw_in, void* raw_out, uint32_t password, size_t len)

　　{

　　const uint8_t* in = (const uint8_t*)raw_in;

　　uint8_t* out = (uint8_t*)raw_out;

　　uint32_t seed = password ^ 0x42381238u;

　　for (size_t i = 0 ; i < len; ++i) {