Question

C# Calculator

So I've got the form for the most part.

BUT I need to see the buttons programmed to actually work.

I also need a read only text box that updates as you enter values to keep track of whats being entered.

And lastly the calculator must understand order of operations to solve a long problem in the right order. Would greatly appreciate help! Would love to see someones version of this to dissect.

Calculator 8 / 7 CE 4 5 1 2 3 0 X

Answer 1

private void n1_Click(object sender, EventArgs e)  {  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "1";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "1";  

    }  

}  

private void n2_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "2";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "2";  

    }  

}  

  

private void n3_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "3";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "3";  

    }  

}  

  

private void n4_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "4";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "4";  

    }  

}  

  

private void n5_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "5";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "5";  

    }  

}  

  

private void n6_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "6";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "6";  

    }  

}  

  

private void n7_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "7";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "7";  

    }  

}  

private void n8_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "0" && textBox1.Text != null)  

    {  

        textBox1.Text = "8";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "8";  

    }  

}  

private void n9_Click(object sender, EventArgs e)  

{  

    if (textBox1.Text == "" && textBox1.Text != null)  

    {  

        textBox1.Text = "9";  

    }  

    else  

    {  

        textBox1.Text = textBox1.Text + "9";  

    }  

}  

  

private void n0_Click(object sender, EventArgs e)  

{  

    textBox1.Text = textBox1.Text + "0";  

}