4

#include <iostream>
#include <cmath>
using namespace std;

float funUd(float x1, float y1, float x2, float y2) {
    return sqrt((pow(x2-x1,2)) + (pow(y2-y1,2)));
}

void fun1(int N, float polje[][2]) {
    float minUd = 1000000;
    float num = 0;
    int pos[2];
    for(int i = 0; i < (N - 1); i++) {
        for(int j = i + 1; j < N; j++) {
            num = funUd(polje[i][0], polje[i][1], polje[j][0], polje[j][1]);
            if(num < minUd) {
                minUd = num;
                pos[0] = i;
                pos[1] = j;
            }
        }
    }
    cout << polje[pos[0]][0] << " " << polje[pos[0]][1] << endl << polje[pos[1]][0] << " " << polje[pos[1]][1] << endl << minUd << endl;

}

int main() {
    int N;
    do {
        cout << "upisite broj N: ";
        cin >> N;
    }while(N <= 0);

    float polje[N][2];

    for(int i = 0; i < N; i++) {
        cout << "Upisite prvi broj: ";
        cin >> polje[i][0];
        cout << "Upisite drugi broj: ";
        cin >> polje[i][1];
    }
    fun1(N, polje);

    return 0;
}