2.1

#include <iostream>

using namespace std;
//double x;
 int a, b, c;

void input() {
//    cout << "Enter x: ";
//    cin >> x;
    cout << "Enter a: ";
    cin >> a;
    cout << "Enter b: ";
    cin >> b;
    cout << "Enter c: ";
    cin >> c;
}

int main() {

    input();

//    while (b < a) {
//        cout << "Input range again:\n";
//        input();
//    }

    cout << "Result = " << a * a + b * b + c * c << endl;
    return 0;
}