public static void Main()
double[] tests = new double[7];
double test1 =95; tests[0]=95;
double test2 =95; tests[1]=95;
double test3 =95; tests[2]=95;
double test4 =95; tests[3]=95;
double test5 =95; tests[4]=95;
double test6 =95; tests[5]=95;
double test7 =95; tests[6]=95;
totaltests = test1 + test2 + test3 + test4 + test5 + test6 + test7;
Console.WriteLine("Total +" + totaltests);
Console.WriteLine("input grade " + ent);
tests[ent] = double.Parse(Console.ReadLine());
totaltests= totaltests + tests[ent];
Console.WriteLine("Total =" + totaltests);