Help to make only numbers in the VVD code, and to give an error

Ошибку типа "Ошибка! используйте числа от 0 до 10"
Буду очень благодарен, а то у меня не получается
(получилось но с косяком, когда ввожу число, а не букву то он сразу не принимает и приходиться ввести еще раз)
вот код

#include <iostream>
using namespace std;

void segment( int *numofsegm, int num)
{
setlocale(0, "Russian");
int counter1,counter2,counter3,num1, num2;

for (counter1 = 0; counter1 < num-2; counter1++) {
for (counter2 = counter1+1; counter2 < num-1; counter2++) {
for (counter3 = counter2+1; counter3 < num; counter3++) {
if ((numofsegm[counter1] + numofsegm[counter2] > numofsegm[counter3]) && (numofsegm[counter1] + numofsegm[counter3] > numofsegm[counter2]) && (numofsegm[counter2] + numofsegm[counter3] > numofsegm[counter1]))//check to triangle
{

cout << "Треугольник может быть создан из " << counter1 + 1 << ", " << counter2 + 1 << ", " << counter3 + 1 << " отрезков " << endl;
}
};
};
};
}



int main()
{

setlocale(0, "Russian");
int counter,counte,num;

do {cout << "Введите число отрезков ";
cin >> num; } while (num < 3);

int *numofsegm = new int[num]; // take memory for array

for (counter = 0; counter < num; counter++) { counte = counter + 1; cout << "Введите длину " << counte << " отрезка " << endl; cin >> numofsegm[counter]; };//filling of array

segment(numofsegm,num);

delete[] numofsegm; //delete memory of numofseg
return 0;
}

Code

#include <iostream>

using namespace std;



void segment( int *numofsegm, int num)

{

    setlocale(0, "Russian");

    int counter1,counter2,counter3,num1, num2;   

    

        for (counter1 = 0; counter1 < num-2; counter1++) {

            for (counter2 = counter1+1; counter2 < num-1; counter2++) {

                for (counter3 = counter2+1; counter3 < num; counter3++) {

                    if ((numofsegm[counter1] + numofsegm[counter2] > numofsegm[counter3]) && (numofsegm[counter1] + numofsegm[counter3] > numofsegm[counter2]) && (numofsegm[counter2] + numofsegm[counter3] > numofsegm[counter1]))//check to triangle

                    {

                        

                        cout << "Треугольник может быть создан из " << counter1 + 1 << ", " << counter2 + 1 << ", " << counter3 + 1 << " отрезков " << endl;

                    }

                };

            };

        };

  }







int main()

{

    

    setlocale(0, "Russian");

    int counter,counte,num;



    do {cout << "Введите число отрезков ";

    cin >> num; } while (num < 3);

    

    int *numofsegm = new int[num]; // take memory for array

    

    for (counter = 0; counter < num; counter++) { counte = counter + 1; cout << "Введите длину " << counte << " отрезка " << endl; cin >> numofsegm[counter]; };//filling of array

    

    segment(numofsegm,num);

    

    delete[] numofsegm; //delete memory of numofseg

    return 0;

}