Everybody is good, such as title, do not use the uuid library, how to implement a uuid generated function? I'm from the Internet to find a new one, seems to have a problem, the code is as follows:

 
/* * 
* Create random UUID 
* 
* @ param buf - buffer to be filled with the uuid string 
*/

The static char * random_uuid (char buf [37]) 
{
Const char * c="89 ab"; 
Char * p=buf. 
int n; 
For (n=0; N & lt; 16. + + n) 
{
Int b=rand () % 255; 
The switch (n) 
{
Case 6: 
Sprintf (p, "x" 4%, b % 15); 
break; 
Case 8: 
Sprintf (p, "% % x c, c [rand () % strlen (c)], b % 15); 
break; 
Default: 
Sprintf (p, "% 02 x", b); 
break; 
} 

P +=2; 
The switch (n) 
{
Case 3: 
Case 5: 
Case 7: 
Case 9: 
* p++='-'; 
break; 
} 
} 
* p=0; 
Return buf. 
} 

//function call 
Void Test () 
{
Char buf [37]={0}; 
Random_uuid (buf); 
}