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| Code Block | ||
|---|---|---|
| ||
enum {len = 12};
char id[len]; //* id will hold the ID, starting with the characters "ID" */
//* followed by a random integer */
int r;
int num;
/* ... */
r = rand(); //* generate a random integer */
num = snprintf(id, len, "ID%-d", r); //* generate the ID */
/* ... */
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Compliant Solution
A better pseudo random number generator is the BSD function random.
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|---|---|---|
| ||
enum {len = 12};
char id[len]; //* id will hold the ID, starting with the characters "ID" */
//* followed by a random integer */
int r;
int num;
/* ... */
srandom(time(0)); //* seed the PRNG with the current time */
/* ... */
r = random(); //* generate a random integer */
num = snprintf(id, len, "ID%-d", r); //* generate the ID */
/* ... */
|
The rand48 family of functions provides another alternative.
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