(Solved) : Please Help C Coding Else Hash Function 2 Parts Code Code Sure Write First Part Generates Q38270421 . . . .

Please Help C++ coding IF ELSE HASH FUNCTION

I have 2 parts of a code a code that i am not too sure how towrite.

first part .

// generates random alphanumeric string of lengthlen
void gen_random(char *s, const int len)
{
   // Define an array with all the providedcharacters
   // Generate random string using the characters oflength ‘len’

So far i have
char alphanum[] = “0123456789!”#$%&'()*+-/.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz”;
for (int i = 0; i < len; ++i) {
s[i] = alphanum[rand() % (sizeof(alphanum) – 1)];
}

s[len] = 0;

Second Part

// compares first len bytes of two hash values hash1 andhash2
int match_digest (char *hash1, char *hash2, int len)
{

   /* Judge whether ‘hash1’ and