Cannot implicitly convert type 'string' to 'int'

Question

1.00/5 (1 vote)

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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();
Console.WriteLine("Średnia: {0}", srednia);
Console.ReadKey();
}
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

Posted 19-Nov-16 1:00am

Member 12859242

Updated 19-Nov-16 1:12am

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Comments

Philippe Mori 19-Nov-16 14:54pm

Use a code block to format your code.

3 solutions

Solution 2

C# is not a typeless language. You have to cast/convert/parse the string into an integer.

C#

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

Posted 19-Nov-16 1:10am

#realJSOP

Updated 19-Nov-16 5:53am

v2

Solution 3

liczby[i] is an int array

C#

int[] liczby = new int[ile_liczb];

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

Posted 19-Nov-16 1:12am

Keviniano Gayo

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Midi_Mick · Accepted Answer · 2016-11-19T01:09:00

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

C#

while (int.TryParse(Console.ReadLine(), out liczby[i]) == false)
    Console.WriteLine("Try again");