为什么是80分，怎么改才能AC呢？

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int dian=0;	
	double qian=0;
	scanf("%d",&dian);
	if(dian<=150)
	{
		qian=dian*0.4463;
	}
	else if(dian>=150&&dian<=400)
	{
		qian+=dian*0.4463;
		qian+=(dian-150)*0.4663;
	}
	else
	{
		qian+=150*0.4463;
		qian+=(400-150)*0.4663;
		qian+=(dian-400)*0.5663;
	}
	printf("%.1f",qian);
    return 0;
}