输出菱形

#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
cin>>n;
for(int i=1;i<=n;i++){
for(int k=1;k<=n-i;k++)cout<<" ";
for(int j=1;j<=i2-1;j++){
if(j1||ji2-1)cout<<"";
else cout<<" ";
}
cout<<endl;
}
for(int i=n-1;i>=1;i--){
for(int k=1;k<=n-i;k++)cout<<" ";
for(int j=1;j<=i2-1;j++){
if(j1||ji2-1)cout<<"";
else cout<<" ";
}
cout<<endl;
}
return 0;
}