C#•2y ago

❔ help with an exercise

I've encountered a weird problem that idk how to fix. Say we've got a string "31131123521" how do i make it so each number of the string is multiplied by one another so the string we have got will be equal to 3 * 1 * 1 * 3 * 1 * 1 * 2 * 3 * 5 * 2 * 1 (this is equal to 540). I have trouble finding a patter or solution to this when it seems very simple. Given a string i just want to multiply each number inside of it

25 Replies

Angius•2y ago

First, you'll need to get an array of numbers from this string Use the fact that a string already is an array of chars And that a method char.GetNumericValue() method exists You'll need to do the multiplications in a loop And keep the result outside of the loop

Despy()OP•2y ago

mind writing some quick code for this ; ; ? heres the structure

        string wholeString = Console.ReadLine();
        string multiplicationNumbers = "";
        foreach (var letter in wholeString)
        {
            if (char.IsDigit(letter))
            {
                multiplicationNumbers += letter;
            }
        }
        Console.WriteLine(multiplicationNumbers);
        for (int i = 0; i < multiplicationNumbers.Length; i++)
        {
            
        }

        string wholeString = Console.ReadLine();
        string multiplicationNumbers = "";
        foreach (var letter in wholeString)
        {
            if (char.IsDigit(letter))
            {
                multiplicationNumbers += letter;
            }
        }
        Console.WriteLine(multiplicationNumbers);
        for (int i = 0; i < multiplicationNumbers.Length; i++)
        {
            
        }

i dont know how to like, i even tried using chatGPT for this and still nothing i dont know in what pattern to multiply the numbers

Angius•2y ago

*

Despy()OP•2y ago

a huge number in the millions always comes up

Shinigami•2y ago

There's no pattern

Angius•2y ago

That's how you multiply

Despy()OP•2y ago

when in fact the answer is 540 i know okay can yall get my code and do it then

Angius•2y ago

Nope Not doing your homework for you

Shinigami•2y ago

We can tell how to do it You could really google what @Angius just told How to make a string into char array?

Despy()OP•2y ago

thats not my problem

Shinigami•2y ago

Then?

Despy()OP•2y ago

i know to convert chars into ints and such. the problem is when i try doing it with code the answer comes up as smth ludicrous in the millions. keep in mind this is the string "31131123521"

Angius•2y ago

Show the code, then

Despy()OP•2y ago

when in fact the answer to 3 * 1 * 1 * 3 * 1 * 1 * 2 * 3 * 5 * 2 * 1 is 540

Angius•2y ago

Show your code that converts the string into an array of ints

Shinigami•2y ago

Yes If the logic for how you're multiplying is flawed then it'd obv show huge number

Despy()OP•2y ago

it is flawed thats what im asking for ; ; the logic itself

Angius•2y ago

Well, show the code

Despy()OP•2y ago

sec

Shinigami•2y ago

Show us what you've done, for us to understand where u went wrong

Despy()OP•2y ago

sorry i had to do smth

string str = "31131123521";
int result = 1;
foreach (char c in str)
{
    int digit = int.Parse(c.ToString());
    result *= digit;
}
Console.WriteLine(result);

string str = "31131123521";
int result = 1;
foreach (char c in str)
{
    int digit = int.Parse(c.ToString());
    result *= digit;
}
Console.WriteLine(result);

Angius•2y ago

Seems to work just fine

Angius•2y ago

Despy()OP•2y ago

nevermind it was my mistake

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ help with an exercise