CODEWITHSUNDEEP
c#
Richard Morris
Richard Morris

Reputation: 29

How to recall a loop after it runs and its condition is reset

Not sure if I've numbed my mind trying to figure this but I'm trying to get a loop to trigger again after it runs by changing its condition in a later branch of code based on user input. Here's the code: 

int moveend = 1;
for (int move = 0; move < moveend; move++)
{   
    if (move < 1)
    {
        Console.WriteLine("Enter a direction to move\n");

        //forloop that allows the output to cycle the legth of array and branch to a new line on 4th output
        for (int i = 0; i < width; i++)
        {
          //for loop code
        }
        //This is the code i'm using to re trigger the previous loop with "move = 0"
        ConsoleKeyInfo kb = Console.ReadKey();
        if (kb.Key == ConsoleKey.UpArrow)
        {
            map[7, 1] = 1;
            map[11, 1] = 0;
            move = 0;
            Console.WriteLine("FIre");
        }
    }
    else
    {
        Console.WriteLine("END");
    }
}

I'm not sure why it is that I can see the "Fire" with this code but it doesn't loop again despite the loop condition being reset within the loop. I expected it to reprint the loop info with the updated array coordinates map[7, 1] = 1; map[11, 1] = 0; but it doesn't. Am I overlooking something or is there something I'm missing about loops?

Upvotes: 1

Views: 741

Answers (2)

Lasse V. Karlsen
Lasse V. Karlsen

Reputation: 391306

The reason is that you set move to 0, but it is already zero.

The loop can loosely be translated to this:

int move = 0;
while (move < moveend)
{
    ... rest of your code
    move++;
}

So move is 0 the whole time throughout the loop, and is increased at the end, and then it is no longer < moveend.

To keep running the loop, perhaps you don't want a for loop at all?

bool keepRunning = true;
while (keepRunning)
{
    keepRunning = false;

    ... rest of your code
    if (...)
        keepRunning = true; // force another run through the loop
}

Upvotes: 1

Mohit S
Mohit S

Reputation: 14044

I am not sure why are you doing it like that I think this might help you to accomplish your task 

bool dirtyBool = true;
while(dirtyBool)
{   
    if (move < 1)
    {
        Console.WriteLine("Enter a direction to move\n");

        //forloop that allows the output to cycle the legth of array and branch to a new line on 4th output
        for (int i = 0; i < width; i++)
        {
          //for loop code
        }
        //This is the code i'm using to re trigger the previous loop with "move = 0"
        ConsoleKeyInfo kb = Console.ReadKey();
        if (kb.Key == ConsoleKey.UpArrow)
        {
            map[7, 1] = 1;
            map[11, 1] = 0;
            move = 0;
            dirtyBool=false;
            Console.WriteLine("FIre");
        }
    }
    else
    {
        dirtyBool=false;
        Console.WriteLine("END");
    }
}

I have added a variable dirtyBool of type Bool which will make loop it again. Modify the code according to your usablility

Upvotes: 0

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