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static void srednia_arytmetyczna()
int suma = 0;
double srednia;
Console.WriteLine("Z ilu liczb chcesz obliczyć średnią arytmetyczną?");
int ile_liczb = Convert.ToInt32(Console.ReadLine());
int[] liczby = new int[ile_liczb];
for (int i = 0; i < liczby.Length; i++)
Console.WriteLine("Podaj {0} liczbę", i + 1);
liczby[i] = Console.ReadLine();
for (int i = 0; i < liczby.Length; i++)
Console.Write(liczby[i] + ", ");
suma += liczby[i];
srednia = (double)suma / liczby.Length;
Console.WriteLine("Średnia: {0}", srednia);
Cannot implicitly convert type 'string' to 'int'
Line 66 => liczby[i] = Console.ReadLine();

What I have tried:

I tried to change some things but without consequence
Updated 19-Nov-16 1:12am
Philippe Mori 19-Nov-16 14:54pm
Use a code block to format your code.

Console.ReadLine returns a string. You cannot assign that to an integer variable or member of integer array.

First thing would be to look at validating the user input.
Take a look at the int.TryParse method. It will validate the user input, and convert it to an integer, all in the one go

something like
while (int.TryParse(Console.ReadLine(), out liczby[i]) == false)
    Console.WriteLine("Try again");
C# is not a typeless language. You have to cast/convert/parse the string into an integer.

string inputStr = Console.ReadLine();
int inputInt;
if (int.TryParse(inputStr, out inputInt)
    liczby[i] = inputInt;
   // invalid input string (could not be converted to an integer)
liczby[i] is an int array
int[] liczby = new int[ile_liczb];

You need to convert string (Console.Readline()) to int before assignment.

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