Clever Geek Handbook

C #, If Statement, Min and Max

Good evening; I am writing some code that solves the following equation.

X - device size Y - device quantity A - denominator Z - total diversified cost

(X * Y) / A = Z

Here is the part I don't know how to accomplish. The value of A is determined by the value of Y. If Y is between 3 and 6 than A = .7, if Y is between 6 and 9 than A = .6; etc.

Which function should I use to achieve the above? Any help is appreciated.

Hello,

Greg Rutledge

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5 answers


There are 3 approaches to this: IMO:

1) Calculation of the formula. So you want to know that A is given to Y if you have enough data, for example. taking your .7 for 3 <= Y <6, .6 for 6 

A = .8-(Y/3)/10.0;

You may need to cast or truncate the Y / 3 part if Y is not a multiple of 3, or you can do this to extract the fractional part: (Y- (Y% 3)) / 3

2) Use a while loop structure to take 3 out of Y, note that the statements in while are abbreviated, which can make this somewhat obscure:



int Holder = Y, A=.8;
while (Holder > 0)
{
    A-= .1;
    Holder-= 3;
}

3) If / elseif. If Y is bounded, then you can use a brute force assignment strategy:

 If Y<3 
    A=.8
 Else if Y < 6 
    A=.7
 Else if Y < 9 
    A=.6

and etc.

This is in the order that I would like to consider to address such a problem.

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You can use if and comparison operators (<=). Homework?

What do you mean by "and so on"? If the cases are regular, then perhaps you can use a formula instead of a bunch of if statements.



if(Y <= 3.0)      A = ...; 
else if(Y <= 6.0) A = 0.7; 
else if(Y <= 9.0) A = 0.6;
...
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Assuming A starts at 0.8 and decreases by 0.1 for each increase of 3 from Y:

int temp = Y / 3;
float A = 0.8f - (temp / 10f);
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Ok, taking the code you just posted, I think this is what you are looking for:

if ((cb5_1.Checked)&&(cb5_2.Checked)&&(cb5_3.Checked))
{
    //if the first three text boxes are checked calculate based on the following. 
    decimal a, b, c, d, z;
    decimal aa, bb, cc, zz;
    a = decimal.Parse(cbx5_1a.Text);
    b = decimal.Parse(cbx5_2a.Text);
    c = decimal.Parse(cbx5_3a.Text);
    aa = decimal.Parse(cbx5_1q.Text);
    bb = decimal.Parse(cbx5_2q.Text);
    cc = decimal.Parse(cbx5_3q.Text);
    z = (aa+bb+cc);

    d = 0.8m - ((z / 3) / 10m);

    zz = ((a*aa)+(b*bb)+(c*cc))*d;

    tb5_atotal.Text = Math.Round(z,2).ToString();
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If the values ​​are predefined in the list and not created using a function.

Basically every object has a minValue, maxValue, value, minLink and maxLink.

Follow the links until you find the target value or null pointer.

if Y <= maxValue then 
    if Y >= minValue then
        return value
    else
        follow minLink
else 
    follow maxLink
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