UVa 10370 Above Average

Above Average

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

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. 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

Output for Sample Input

40.000%
57.143%
33.333%
66.667%
55.556%

#include <stdio.h>
#include <iostream>

using namespace std;

int main()
{
    int testcase, length;
    cin >> testcase;
    while (testcase--){
        cin >> length;
        double sum = 0;
        double *scores = new double[length];
        int count = 0;

        for (int i = 0; i < length; i++){
            cin >> scores[i];
            sum += scores[i];
        }

        double avg = sum / length;

        for (int i = 0; i < length; i++){
            if (scores[i] > avg){
                count ++;
            }
        printf(".3f%%\n", count * 100.0 / length);
        }
    }
}