1915_Above Average（百分数的输出）

It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check.

Input

The first line of standard input contains an integer C, the number of test cases. C data sets follow. Each data set begins with an integer, N, the number of people in the class (1 <= N <= 1000). N integers follow, separated by spaces or newlines, each giving
the final grade (an integer between 0 and 100) of a student in the class.

Output

For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.

Sample Input

5

5 50 50 70 80 100

7 100 95 90 80 70 60 50

3 70 90 80

3 70 90 81

9 100 99 98 97 96 95 94 93 91



Sample Output

40.000%

57.143%

33.333%

66.667%

55.556%

Source: University of Waterloo Local Contest 2002.09.28

××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××

#include<iostream>

#include <iomanip>

using namespace std;

int main()

{

int n;

int num;

double stu[1000]={0},score,count;

int i;

cin>>n;

while(n--)

{

score=count=0;

cin>>num;

for(i=0;i!=num;i++)

{

cin>>stu[i];

score+=stu[i];

}

score=score/num;

//cout<<"score:"<<score<<endl;

for(i=0;i!=num;i++)

{

if(stu[i]>score)

count++;

stu[i]=0;//为下一次初始化

}

cout<<setiosflags(ios::fixed)<<setprecision(3)<<count*(100.0/num)<<"%"<<endl;//必须是浮点数100.0，而不是整型100

}

return 0;

}