怎么把sum和i掉换输出呢？

#include<bits/stdc++.h>
using namespace std;
int a,b,sum;
int main(){
	cin>>a>>b;
	for(int i=a;i<=b;i++){
		if((i%400==0)||((i%4==0)&&(i%100!=0))){
			sum++;
			cout<<i<<" "; 
		}
	}
	cout<<sum<<endl;
	return 0;
}