Windows：使用CoCreateGuid函数（GUID）

#include <stdio.h>  #define GUID_LEN 64      int main(int argc, char* argv[])  {      char buffer[GUID_LEN] = { 0 };      GUID guid;          if (CoCreateGuid(&guid))      {          fprintf(stderr, "create guid error\n");          return -1;      }      _snprintf(buffer, sizeof(buffer),          "%08X-%04X-%04x-%02X%02X-%02X%02X%02X%02X%02X%02X",          guid.Data1, guid.Data2, guid.Data3,          guid.Data4[0], guid.Data4[1], guid.Data4[2],          guid.Data4[3], guid.Data4[4], guid.Data4[5],          guid.Data4[6], guid.Data4[7]);      printf("guid: %s\n", buffer);      return 0;  }

#include <uuid/uuid.h>    int main()  {      uuid_t uu;      int i;      uuid_generate( uu );        for(i=0;i<16;i++)      {          printf("%02X-",uu[i]);      }      printf("\n");      return 0;  }