这个图像出不来是怎么回事

#include <iostream>
using namespace std;
int main() {
const int N=4;int i=1;int j=1;
for(;i<=N;i++){
for (;j<=30;j++)
cout<<" ";
for(;j<=8-2*i;j++)
cout<<" ";
for(;j<=2*i-1;j++)
cout<<"*";
cout<<endl;
}
for(;i<=N-1;i++){
for (;j<=30;j++)
cout<<" ";
for(;j<=7-2*i;j++)
cout<<"*";
cout<<endl;
}
return 0;
}