Using a boolean variable with an if statement?

Question

Im currently trying to make a basic clicker game to start to teach myself how to do C# and i've been able to resolve most problems with this part but not yet. Right not I'm programming a buyable upgrade that generates money on it's own which I think I got down but theres an error with one of the if statements and I don't know to fix it. Does anyone else know what I did wrong?

Code:

    private int a = 0;
    private void flatButton1_Click(object sender, EventArgs e)
    {
        a++;
        flatTextBox1.Text = a.ToString($"Knowledge: {a}");
    }

    private void flatButton2_Click(object sender, EventArgs e)
    {
        if (a >= 50)
        {
            bool upgrade1 = true;
        }
        if (upgrade1 == true)
        {
            for ( ; ; )
            {
               a = a + (a++ * 2);
            }
        }

The only thing that is giving an error is the if(upgrade1 = true), the upgrade1 is the error, it says that The name 'upgrade1' does not exist in the current context.

Rhday Parikh · Accepted Answer · 2020-05-06 03:42:37Z

2

You have declared variable "upgrade1" in the scope of 1st IF statement so it can only be used in that IF statement. You need to declare "upgrade1" variable globally. (outside of IF statement

 private int a = 0;
private void flatButton1_Click(object sender, EventArgs e)
{
    a++;
    flatTextBox1.Text = a.ToString($"Knowledge: {a}");
}

private void flatButton2_Click(object sender, EventArgs e)
{
    bool upgrade1 =false;
    if (a >= 50)
    {
       upgrade1 = true;
    }
    if (upgrade1 == true)
    {
        for ( ; ; )
        {
           a = a + (a++ * 2);
        }
    }

answered May 6, 2020 at 3:42

Rhday Parikh

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Comments

RmD · Accepted Answer · 2020-05-06 03:42:26Z

1

You have to remember about scopes when writing code. The reason your code isn't working is because the if statement check to see if upgrade1 is true has no idea that the variable upgrade1 even exists. You have to move the variable definition out one scope so the if statement check knows what you are talking about. Hope this helps!

This should fix your issue:

private void flatButton2_Click(object sender, EventArgs e)
{
    bool upgrade1;
    if (a >= 50)
    {
        upgrade1 = true;
    }
    else
    {
        upgrade1 = false;
    }
    if (upgrade1 == true)
    {
        for ( ; ; )
        {
           a = a + (a++ * 2);
        }
    }
}

answered May 6, 2020 at 3:42

RmD

212 bronze badges

Comments

qqqqqkks · Accepted Answer · 2020-05-06 03:42:35Z

1

That is because you defined upgrade1 in your first if statement, so your second can't reach it.

Change your code to this:

private int a = 0;
private void flatButton1_Click(object sender, EventArgs e)
{
    a++;
    flatTextBox1.Text = a.ToString($"Knowledge: {a}");
}

private void flatButton2_Click(object sender, EventArgs e)
{
    bool upgrade1;
    if (a >= 50)
    {
       upgrade1 = true;
    }
    if (upgrade1 == true)
    {
        for ( ; ; )
        {
           a = a + (a++ * 2);
        }
    }
}

answered May 6, 2020 at 3:42

qqqqqkks

2571 gold badge5 silver badges27 bronze badges

1 Comment

IKU Brontide Over a year ago

thanks both of you ill try the first one then the second one, i appreciate it!

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