Fb help

#include <iostream>

using namespace std;

int main()
{
    int a, b, c, x;
    cout << "a= "; cin >> a;
    cout << "b= "; cin >> b;
    cout << "c= "; cin >> c;
    if(a > b){
        x = a;
        a = b;
        b = x;
    }
    if(b > c){
        x = b;
        b = c;
        c = x;
    }
    if(a > b){
        x = a;
        a = b;
        b = x;
    }
    if(b == (a + c) / 2)
        cout << a <<" " << b << " " << c << " sunt in progresie aritmetica";
    else
        cout << a <<" " << b << " " << c << "  nu sunt in progresie aritmetica";
    return 0;

}