int setgolf(golf & g)
{
    int next;
    std::cout << "Please enter golfer's full name: ";
    std::cin.getline(g.fullname, Len);
    if (g.fullname[0] == '\0')
        return 0;                // premature termination
    std::cout << "Please enter handicap for " << g.fullname << ": ";
    while(!(std::cin >> g.handicap))
    {
        std::cin.clear();
        std::cout<<"please enter a integer: ";
    }
    while (std::cin.get() != '\n')
        continue;
    return 1;
}
Enter up to 5 golf team members:
Please enter golfer's full name: reg
Please enter handicap for reg: w（输入w后就进入死循环）

我知道啦 在while循环里加一个std::cin.get(next);就不会进入死循环啦