Fuction Overloading

#include <iostream>
using namespace std;
// прототипы перегруженных функций
int multiplication(int n, int *a);
float multiplication(int n, float *b);
double multiplication(int n, double *c);
int main()
{
    int n;
    cin >> n;
    int *a = new int[n]; // for first (int) multiplication
    float *b = new float[n]; // for second (float) multiplication
    double *c = new double[n];// for third (double) multiplication
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    cout << "Int multiplication: " << multiplication(n, a) << endl;
    for (int i = 0; i < n; i++) {
        cin >> b[i];
    }
    cout << "Float multiplication: " << multiplication(n, b) << endl;
    for (int i = 0; i < n; i++) {
        cin >> c[i];
    }
    cout << "Double multiplication: " << multiplication(n, c) << endl;
    return 0;
}
int multiplication(int n, int *a) {
    int res = 1;
    for (int i = 0; i < n; i++) {
        if (a[i] != 0)
            res *= a[i];
    }
    return res;
}
float multiplication(int n, float *a) {
    float res = 1;
    for (int i = 0; i < n; i++) {
        if (a[i] != 0)
            res *= a[i];
    }
    return res;
}
double multiplication(int n, double *a) {
    double res = 1;
    for (int i = 0; i < n; i++) {
        if (a[i] != 0)
            res *= a[i];
    }
    return res;
}