The util_itoa function converts a specified integer to a string, and returns the length of the string. Use this function to create a textual representation of a number.
int util_itoa(int i, char *a);
The length of the string created.
int i is the integer to be converted.
char *a is the ASCII string that represents the value. The user is responsible for the allocation and deallocation of a, and it should be at least 32 bytes long.