Check if string is valid IPv4 ip address

Given a string, we need to print whether the string is a valid IPv4 ip address or not. For example, 12.2.3.4 is valid IP address and 1222.2.22.33 is not.
The key steps in writing an verifyIP function are:

• Length of the string should be less than equal to 15. As each sub part of the IP can be at max 3 digits and we can have at max 3 dots.
• The string should have 4 parts separated by 3 dots.
• Each part should be greater than 0 and less than 256.

void verifyIP(char *s )
{
    int count=0;
    char *str = new char[strlen(s)];
    strcpy(str,s);

    //Check if length of string is greater than 15.
    if(strlen(str)>15)
    {
        cout<<"Not an IP Address"<<endl;
        return;
    }
    
    char *ip=strtok(str,".");
    
    while(ip!=NULL)
    {
        count++;

        //Check that each subpart is less than 256
        if(atoi(ip)>255)
        {
            cout<<"Not an IP address"<<endl;
            return;
        }
        ip=strtok(NULL,".");
    }

    //Check that we have 4 parts in the ip
    if(count==4)
        cout<<"Correct IP Address"<<endl;
    else
        cout<<"Not an IP Address"<<endl;
}