C# Practice 12: Code Lesson

Question

In this practice i have to write code for solving the area of a circle.

The problem is, there is a bug.
The Input of the same variable is not the same as the output.

Anyone had this problem too?

Answer 1

Anton Lieske, console.Read() returns an integer. And there is a problem with it converting to double like that. It could be done using Parse. Or in this case it is easier to just use ReadLine instead:

radius=Convert.ToDouble(Console.ReadLine());

Answer 2

Anton Lieske
Aleksei Radchenkov

Console.Read() returns as int and it reads only single character so when you enter 5 it considered as a character which print ASCII value.

53 is a ASCII value of 5 so

Console.Write(Console.Read()) //print 53 when you enter 5

@Anton - This is not a bug.

Answer 3

A͢J - S͟o͟l͟o͟H͟e͟l͟p͟e͟r͟, Oh, I didn't know that about read() returning character code))) Thanks :)

Answer 4

Nice👍

Answer 5

Anton Lieske

This program will print ASCII value of 0-9 digits

https://code.sololearn.com/cZMu8YBbQu7H/?ref=app

Answer 6

Anton Lieske

Where is your code? And which language?

Answer 7

Anton Lieske, mate he meant which programming language. And we can't help you unless you show us your code.

Answer 8

Ah sorry.. i forget to tell that it is c#

Answer 9

Anton Lieske

I thought you were comparing input with test cases output.

Now I understood you wanted to check your input is right or not.

Answer 10

Ok i didnt know that the int value of the string "5" is "53". nice to know, if something like this happens again.

I forget to convert and he gives numerical values back, so i didnt doubt my code. That was the problem.
Now it works fine. 👌

Answer 11

Thanks ✌️

Answer 12

Thats the code:

const double pi = 3.14;
double radius;
double solution;

radius=Console.Read();
Console.Write(radius);

Input: 5
Output:53

Answer 13

Anton Lieske

1 - Convert radius input to double
2 - you don't have to print input, you have to print area of circle so use formula pi * r * r

Answer 14

I know how to solve it. But the problem is that
Input isnt the same as output.

Answer 15

Please.. understand, that the output with a value of 53 doesnt makes sense when input was 5.

There was no calculation in this code. So input has to be output.

Answer 16

Ok now it works:

3.14;

double solution;

double radius = Convert.ToDouble(Console.ReadLine());

solution = radius * radius * pi;

Console.Write(solution);