std::string  GetBest()
		{
			std::string the_best(population[best_index]->genes);

			the_best += "\0";
			return the_best;
		}
int main()
{
    float student_subject[10][5];
    int i,j;
    printf("please input your grades:");
    for(i=0;i<10;i++)
        {for(j=0;j<5;j++)
            scanf("%f",&student_subject[i][j]);
         printf("\n");
        }
    student_average(student_subject);
    subject_average(student_subject);
    the_best(student_subject);
    student_variance(student_subject);
    return 0;
}