Ввод чисел в структуру вектор

#include <iostream>
using namespace std;
const int size = 10;
typedef int ptype;
struct vector{
    ptype x;
    ptype y;
};
vector data[size] = { { 0, 0 }, { -4, -2 }, { 1, 1 }, { 0, 1 }, { 6, 3 }, { 3, 3 }, { -2, -1 }, { -5, -2 }, { -4, -5 }, { -1, -4 } };
 
bool are_ortho(vector a, vector b){
    return (a.x*b.y + a.y*b.x) != 0;
}
vector norm(vector a){
    vector result = { a.y, -a.x };
    return result;
}
ptype norm2(vector a){
    return (a.x*a.x + a.y*a.y);
}
vector Minus(vector a, vector b){
    vector result = { a.x - b.x, a.y - b.y };
    return result;
}
ptype dot_product(vector a, vector b){
    return a.x*b.x + a.y*b.y;
}
int main(){
 
    int inside = 0, outside = 0;
    bool in;
    int i, j, k, t;
    ptype a, b, c, d;
    vector ab, ad;
    vector norms[4];
    int pmax = 0;
    int max[4];
    for (int i = 0; i<size; i++)
    for (int j = i; j<size; j++)
    for (int k = j; k<size; k++)
    for (int t = k; t<size; t++){
        ab = Minus(data[i], data[j]);
        ad = Minus(data[t], data[i]);
        a = norm2(ab);
        b = norm2(Minus(data[j], data[k]));
        c = norm2(Minus(data[k], data[t]));
        d = norm2(ad);
        if (a == b && a == c && a == d)
        if (are_ortho(ab, ad))
        if (pmax<a + b + c + d){
            pmax = a + b + c + d;
            max[0] = i, max[1] = j, max[2] = k, max[3] = t;
        }
    }
    cout << "max square are points number:" << max[0] << " " << max[1] << " " << max[2] << " " << max[3] << endl;
    for (int i = 0; i<4; i++)
        norms[i] = norm(Minus(data[max[(i == 3) ? 0 : i + 1]], data[max[i]]));
    for (int i = 0; i<size; i++)
    if (i != max[0] && i != max[1] && i != max[2] && i != max[3]){
        in = true;
        for (j = 0; j<4; j++)
            in = (in&&dot_product(Minus(data[i], data[max[j]]), norms[j])<0);
        if (in) inside++;
    }
    outside = size - inside;
    cout << "inside: " << inside << "points, outside: " << outside << "points" << endl;
    system("pause");
    return 0;
}

for(int i=0;i<size;i++)
   cin>>data[i].x>>data[i].y;

{
   cout>>"Enter x "<<i<<" point:";
   cin>>data[i].x;
   cout>>"Enter y "<<i<<" point:";
   cin>>data[i].y;
}