#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <iomanip.h>
double weight[101];
int compare(const void *arg1,const void *arg2)
{
	return *(double *)arg1<*(double *)arg2;
}


int main()
{
	int N,i,j;
	double total,temp;
	
	total=0;
	
	cout.setf(ios::fixed);
	cout.setf(ios::showpoint);
	cout.precision(3);
	cin>>N;
	for(i=0;i<N;i++) cin>>weight[i];
	qsort(weight,N,sizeof(double),compare);
	for(i=0;i<N;i++)
		for(j=i+1;j<N;j++)
			if (weight[i]<weight[j]){
				temp=weight[i];
				weight[i]=weight[j];
				weight[j]=temp;
		}
	
	total=weight[0];
	for(i=1;i<N;i++) total=2*sqrt(total*weight[i]);
	cout<<total<<endl;
	return 0;
}

• 你的compare函数写错了 (782) flyingfish 2004-09-30 15:04:01
  • 那该怎么写,在zoj都是这样写的 (0) wanglei 2004-09-30 16:24:30
    • Re:那该怎么写,在zoj都是这样写的 (96) windbells 2004-09-30 16:43:36
      • Thank you! (104) wanglei 2004-09-30 17:40:03