Lab 9 z3

#include <iostream>
using namespace std;
int n;
double *mas=new double [n];
double shift(int, double);
int main()
{
    cout << "enter n " << endl;
    cin >> n;
    for (int i=0; i<n; i++)
    cin >> mas[i];
    double t=mas[n-1];
    shift(n, t);
    for (int i=0; i<n; i++)
    cout << mas[i] << "   ";
    return 0;
}
double shift(int a, double b)
{      if (n%2!=0)
{
        for (int i=a-1; i>1; i-=2)
        mas[i]=mas[i-2];
        mas[0]=b;
        for (int i=0; i<a; i++)
        return mas[i];
}
else
{
    for (int i=a-2; i>1; i-=2)
        mas[i]=mas[i-2];
        mas[0]=mas[a-2];
        for (int i=0; i<a; i++)
        return mas[i];
}
}