问错误:数组下标的类型'int[int]‘无效|

EN

#include <iostream>
using namespace std;

int n, x[50], y[50], z[50];

void citire(int &n, int v)
{
    int i;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cout << "v[" << i << "]=";
        cin >> v[i];
    }
}

void afisare(int n, int v[])
{
    int i;
    for (i = 1; i <= n; i++)
        cout << v[i] << " " << endl;
}

void s(unsigned n, int x[], int y[], int z[])
{
    int i;
    for (i = 1; i <= n; i++)
        z[i] = abs(x[i] - y[i]);
}

int main()
{
    cout << "n=";
    cin >> n;
    cout << "x[]:" << endl;
    citire(n, x);
    cout << "y[]:" << endl;
    citire(n, y);
    cout << "Elementele primului vector" << endl;
    afisare(n, x);
    cout << "Elementele celui de-al doilea vector:" << endl;
    afisare(n, y);

    s(n, x, y, z);
    cout << "z[]:" << endl;
    return 0;
}