C++獲取全球唯一標識號

在windows下使用CoCreateGuid()函式

#include <objbase.h>  
#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;  
}