Rombo PROGRA

#include <iostream>
#include <conio.h>
using namespace std;
void lineas(int N,int i){
	int k;
	for(k=1;k<=N-i;k++){cout<<"  ";}
	for(k=1;k<=2*i-1;k++){
		cout<<k;
		if(k<2*i-1){cout<<" ";}}
}
int main(){
	int i,N;
	cin>>N;
	cout<<endl;
	for(i=1;i<=N;i++){
		cout<<endl;
		lineas(N,i);
		cout<<endl;}
	for(i=N-1;i>=1;i--){
		cout<<endl;
		lineas(N,i);
		cout<<endl;}
	_getch();
}