piramida c++

#include <iostream>
#include <fstream>
#include <cmath>
#include <vector>
#include <algorithm>
#include <cstdio>
#include <math.h>


using namespace std;

int n;

int main(int argc, const char * argv[]) {
    cin>>n;
    int b=n-1;
    int c=1;
    for (int i=1; i<=n;i++){
    	for(int j=1; j<=b; j++){
    		cout<<"0";
    	}
    	for(int d=1; d<=c; d++){
    		cout<<"*";
    	}
    	c=c+1;
    	b=b-1;
    	cout<<endl;
    }
}