ciurul lui eratostene 2

int n, a[100], k = 0, b = 0, c[100];
	cout << "n="; cin>>n;
	for (int i=3; i<=n; i+=2)
		a[k++]=i;
	for (int i=0; i<k; i++)
	{
		if (a[i] != 0)
			c[b++] = a[i];
		for (int j=i+1; j<k; j++)
		{
			if (a[i]!=0)
			{
				if (a[j]%a[i]==0)
					a[j]=0;
			}
		}
	}
	for (int i=0; i<b; i++)
		cout<<c[i]<<" ";