uva 10370 - Above Average

 #include <iostream>
 #include <cstdio>
 using namespace std;

 int main()
 {
     unsigned C, N, tot_gra, aver, abo_c, gra[];
     float perc;
     int i;
     cin >> C;
     while(C--)
     {
         cin >> N;
         tot_gra = ;    // tot_gra: total_grade
         for(i = ; i <= N; i++)
         {
             cin >> gra[i];
             tot_gra += gra[i];
         }

         aver = tot_gra / N;

         abo_c = ;
         for(i=; i <= N; i++)
             if(gra[i] > aver)
                 abo_c ++;

         perc = float(abo_c) / N * ;
         printf("%0.3f%%\n", perc);
     }
     return ;
 }