计算商场优惠

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#include<stdio.h>
#include<string.h>
#include<math.h>
double amount(double list[], int n, double min)
{
	int i;
	double sum = 0, cheap = list[0];
	for (i = 0; i < n; i++)
	{
		sum = sum + list[i];
		if (list[i] < cheap) //找出最小的
			cheap = list[i];
	}
	if (n < 5)
	{
		return sum;
	}
	else if (sum < min)
	{
		return sum;
	}
	else
	{
		return sum - cheap;
	}
}
int main()
{
	int  n;
	double min,sum;
	double list[100];
	scanf("%d %lf", &n, &min);
	for (int i = 0; i < n; i++)
	{
		scanf("%lf", &list[i]);
	}
	sum = amount(list, n, min);
	printf("%.2f", sum);
	return 0;
}