Question

I am required to write a program that reads data into an array of type int. Valid values are from 0 to 10. your program should determine how many values were input. Output a list of distinct entries and a count of how many times that entry occurred.”

I’m having trouble with the bolded part, this is what i have so far…

static void Main(string[] args)
{
    Console.WriteLine("How many scores will you enter?");

    int total = 0;
    string inValue;
    string Size = Console.ReadLine();
    int arraySize = Convert.ToInt32(Size);
    int [] ScoreArray = new int [arraySize];

    for (int i = 0; i < ScoreArray.Length; i++)
    {

        Console.Write("Enter a Number between 0 and 10, #{0}: ", i + 1);
        inValue = Console.ReadLine();
        ScoreArray[i] = Convert.ToInt32(inValue);

        total += ScoreArray[i];
    }

    Console.WriteLine("Number of scores entered: " + arraySize);
    Console.Read();
}

Answer 1

I think the key here is valid values are between 0-10. I would use the array index to store each value itself. For example, if you process the value 5, increment values[5].

So first you’d initialize an array like:

int[] values = new int[11]; //Values 0-10

Then, loop until the user just enters blank:

while(true)
{
   string inValue = Console.ReadLine();
   if(String.IsNullOrEmpty(inValue)) break;

   values[Convert.ToInt32(inValue)]++; //Bounds checking would be nice here
}

You can then display a sorted distinct list by looping through the array once and printing out any index with a value greater than 0:

for(int i = 0; i < values.length; i++)
{
   if(values[i] > 0)
   {
      Console.WriteLine("Value {0} was entered {1} time(s)..", i, values[i]);
   }
}

This is most likely what your professor is looking for. I have not tested the code above, that’s your job 🙂