曼哈顿距离

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int xc=n/2,yc=n/2;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<n;j++)
        {
            if(abs(i-xc)+abs(j-yc)<=n/2)
            cout<<'*';
            else cout<<' ';
        }
        cout<<endl;
    }
    return 0;
}