C# String Arrays

Question

https://code.sololearn.com/cJcj2318Tgz5/?ref=app

My code passed 4 out of 5 tests. What is wrong?
Task:

You are creating an authentication system.
The password shouldn't contain any of these symbols:
char[] notAllowedSymbols = { '!', '#', '

Answer 1

Nazar Sumyk , there is no need to have 2 loops. you can use one loop picking the elements and then use string method .Contains() to check for element. so it could look like this: (AND PLEASE: -->> use proper formatting of your source code. this helps reading and understanding the code)

...
for (int i = 0; i < notAllowedSymbols.Length; i++)
{
if (password.Contains(notAllowedSymbols[i]))
{
Console.WriteLine("Invalid");
break;
}
}
...

Answer 2

Nazar Sumyk , i have done an other simple version. it is using the Intersect() extension method on Enumerable. It works on any IEnumerable<T> including arrays. to make this code run, password and sequence with "notAllowedChars" have to be the same data format. so the input of the password will be converted directly. in this case i used char[] array. but it does also work with 2 strings.

see the code in the file:

https://code.sololearn.com/ct77OTs6ztHQ/?ref=app

Answer 3

There are many possible solutions to fix. Just some ideas:
- 1 loop and string.Contains()
- bool variable "invalid" (the C way)
- Function and return instead of break

Answer 4

You have two loops, break just ends the inner loop. You get multiple output if password contains multiple disallowed symbols

Answer 5

so what need add or delete or change? help ._.

Answer 6

Last - closed test (5) wrong

Answer 7

Lothar , it’s cool
but i don’t learn this method :)
thank you! 😅

Answer 8

foreach(char k in notAllowedSymbols )
{
if( password.Contains(k)){
Console.WriteLine("Invalid");
break;
}

Answer 9

string password = Console.ReadLine();
char[] notAllowedSymbols = { '!', '#', '#x27;, '%', '&', '(', ')', '*', ',', '+', '-' };

//your code goes here
foreach(char ch in notAllowedSymbols)
{
if(password.Contains(ch))
{
Console.WriteLine("Invalid");
break;
}
}

Answer 10

Can someone please explain why it is failing the fifth test?

Answer 11

Hello everyone I need you r help I don't know c# but my teacher wants sololern certificate c# I can't pass project please help