Вывести на консоль точки, отвечающие условию

#include <iostream>
using namespace std;
int main() {
    int x1,x2,x3,x4, c;
    cin >> x1 >> x2 >> x3 >> x4;
    int k =  0;
    int m = 0;
    c = 0;
    if (x1 > x2) {
        c = x1;
        x1 = x2;
        x2 = c;
    }
    if (x3 > x4) {
        c = x3;
        x3 = x4;
        x4 = c;
    } 
    if ((x1 > x3 && x1> x4 && x2 > x3 && x2 > x4) || (x1 < x3 && x1 < x4 && x2 < x3 && x2 < x4)) k = 0;
    else if ( x3 <= x2 && x3 >= x1 ) {
        if(x2 <= x4)
            k = abs(abs (x2) - abs(x3)) + 1;
        else        
            k = abs(abs (x4) - abs(x3)) + 1;
        }
    else if (x3 <= x1 && x1 <= x4) {
    
        if (x2 <= x4) 
            k = abs(abs (x2) - abs(x1)) + 1;
        else k = abs(abs (x4) - abs(x1)) + 1;
    }
    else if (x1 == x3 && x2 == x4) 
        k = abs(abs ( x2) - abs(x4)) + 1;
    else if (x1 <= x4 && x2 == x3 && x4!= x2) 
        k = abs(abs (x4) - abs(x1)) - 2 ;
    else if (x1 <= x4 && x2 == x3 && x3 == x4) 
        k = abs(abs ( x4) - abs(x1)) - 1;
    else if (x1 == x2 && x2 == x3 && x1 <= x4) 
        k =abs( abs (x4) - abs(x1))  ;
    else if (x3 <= x2 && x1 == x4 && x2 != x1)
        k = abs(abs (x2) - abs(x3)) +1;
    cout << k;
    system ( "pause");
return 0;
}