1-1

#include <iostream>
#include <cmath>
#include <iomanip>

using namespace std;

int main() {
    int  n = 1;
    float a, b, c, d;


        cout << "Upisi " << n << " ti broj: ";
        cin >> a;
        n++;
        cout << "Upisi " << n << " ti broj: ";
        cin >> b;
        n++;
        cout << "Upisi " << n << " ti broj: ";
        cin >> c;
        n++;
        cout << "Upisi " << n << " ti broj: ";
        cin >> d;

        cout << "Aritmeticka sredina iznosi: " << setprecision(3) << (a + b + c + d) / 4.00;
        system("pause");


    system("pause");
    return 0;
}