How to get C/C++ numbers and get the sum excluding the smallest and largest numbers.

#include <iostream>

using namespace std;

int minmax(int num) {
    int value, sum;
    int min, max;

    min = 9999;
    max = 0;

    for (int i = 0; i < num; i++) {
        cout << "Enter your values please " << endl;
        cin >> value;
        sum += value;

        if (max  < value) {
            max = value;
        }
        else if (min > value) {
            min = value;
        }
    }
    return sum - max - min;
}

int main() {
    int n, res;
    cout << "Enter your number please " << endl;
    cin >> n;

    res = minmax(n);

    cout << "The summation of values execpt maximum and minimum is : " << res << endl;

    return 0;
}