#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;  
}