Develop Reference

Fix user input not continuing until the entered user input loops to match its index in the array

The problem I have is that when I enter an element from the array, the user input resets to the start of the loop, for example when i user input the third element from the array, the user input question two more times to continue to the next user input question, how can I fix this? everybody know what I can adjust here.
worked loop image with 1st element entered
looping error
while (true)
{
String[] bgtype = { "cheeseburger","tlc", "bbq" };
int[] bgtypeprice = { 15, 25, 10 };
int max = bgtype.Length;
String[] product = new string[max];
String[] type = new string[max];
int[] qty = new int[max];
int[] disc = new int[max];
Console.WriteLine("");
for (int i = 0; i < max; i++)
{
Console.Write("What PRODUCT would you like to buy ?: "); ;
product[i] = Console.ReadLine();
if (product[i].Equals("burger", StringComparison.CurrentCultureIgnoreCase))
{
{
Console.Write("What TYPE of product would you like to buy?: ");
type[i] = Console.ReadLine();
if (bgtype[i].Contains(type[i]))
{
Console.Write("Enter your discount % (5% for adults & 7% for minors): ");
disc[i] = Convert.ToInt32(Console.ReadLine());
Console.Write("How many will you buy? ");
qty[i] = Convert.ToInt32(Console.ReadLine());
float total = bgtypeprice[i]; total *= qty[i];
Console.WriteLine("Total cost of " + type[i] + " " + product[i] + " is: " + qty[i] + " pieces x P" + bgtypeprice[i] + "= P" + total);
float totaldisc = 0; totaldisc = (total * disc[i]) / 100;
Console.WriteLine("Total amount of discount: P " + totaldisc);
float totalamt = 0; totalamt = total - totaldisc;
Console.WriteLine("Total cost of order: P " + totalamt);
Console.WriteLine("-------------------ORDER CONFIRMATION-------------------");
}}}}}

if (bgtype[i].Contains(type[i])) should be changed to if (bgtype.Contains(type[i]))
Array.Contains, verifies if an item is contained within an Array, not an Array value. By asking if bgtype[i] contains type[i], you are asking if cheesburger contains tlc, which it doesn't, hence why it starts from the beginning. By verifying if bgtype contains type[i], you are asking if ["cheesburger", "tlc", "bbq"] contains tlc, which it does. I hope this was clear enough.

Difference between two Arrays C# (Random input + User input)

I've created an array which generate 10 random numbers, and I want it to be compared to user input of 10 numbers. If 6 numbers are equal to the random generated numbers (from 1 to 25) then it should show a 6.
Also, the order should not matter. If the user input the number 8 as his or her first selection, it should be able to be compared to the random generated number if it generated number 8 as its last selection. Which in the end should show the result of minimum 1.
Random r = new Random();
int MyRandomNr = r.Next(1, 26);
// Random Generator
var ArrayRandom = new int[] { MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr, MyRandomNr };
Console.Write("HELLO AND WELCOME!"
+ System.Environment.NewLine + "Type in 10 numbers."
+ System.Environment.NewLine + "A number between from 1 to 25, one number at the time " + System.Environment.NewLine);
string[] ArrayUser = new string[10];
for (int i = 0; i < 10; i++)
{
Console.Write((i + 1) + ". Next number is: ");
ArrayUser [i] = Console.ReadLine();
}
I've looked through the Stackoverflow and the following code doesn't really compare the two arrays in the way I want it to compare to each other. The following code works more like an exam, but I'm looking for something similar to this...
int[] answer = { 1, 3, 4};
int[] exam = { 4, 1, 3};
int correctAnswers = 0;
int wrongAnswers = 0;
for (int index = 0; index < answer.Length; index++)
{
if (answer[index] == exam[index])
{
correctAnswers += 1;
}
else
{
wrongAnswers += 1;
}
}
Console.Write("The matching numbers are " + correctAnswers +
"\n" + "The non matching numbers are " + wrongAnswers);

Read characters from a single line including whitespaces rather than from a new line

IN C# i am trying to solve a problem :
Write a program that checks whether the product of the odd elements is equal to the product of the even elements.
The only thing left is:
On the second line you will receive N numbers separated by a whitespace.
I am unable to get this working. I have tried with Split but it keeps breaking. Can someone help?
Example:
Input
5
2 1 1 6 3
Output
yes 6
static void Main(string[] args)
{
long N = long.Parse(Console.ReadLine());
long[] array = new long[N];
long ODD = 1;
long EVEN = 1;
for (int i = 0; i < N; i++)
{
array[i] = int.Parse(Console.ReadLine());
if ((i + 1) % 2 == 0)
{
EVEN *= array[i];
}
else
{
ODD *= array[i];
}
}
if (EVEN == ODD)
{
Console.WriteLine("yes" + " " +
ODD);
}
else
{
Console.WriteLine("no" + " " + ODD + " " + EVEN);
}
}

Read from console input and keep it to an string array, Then convert each array element to long and apply the Odd Even logic like below:
static void Main(string[] args)
{
string input = Console.ReadLine();
string[] inputArray = input.Split(' ');
long element;
long odd = 1;
long even = 1;
foreach (var i in inputArray)
{
element = long.Parse(i);
if (element % 2 == 0)
{
even *= element;
}
else
{
odd *= element;
}
}
Console.WriteLine("\nOdd product = " + odd + ", Even product = " + even);
if (odd == even)
{
Console.WriteLine("ODD == EVEN \n");
Console.WriteLine("Yes" + " " + odd);
}
else
{
Console.WriteLine("ODD != EVEN \n");
Console.WriteLine("No" + " " + odd + " " + even);
}
Console.ReadKey();
}

long[] nums = input.Split(' ').Select(x => long.Parse(x))..ToArray(); //split numbers by space and cast them as int
int oddProduct = 1, evenProduct = 1; // initial values
foreach(long x in nums.Where(a => a%2 == 1))
oddProduct *= x; // multiply odd ones
foreach(long x in nums.Where(a => a%2 == 0))
evenProduct *= x; // multiply even ones

Points on chart graphic don't fit y-lines

Points on my second chart don't fit y-axis as you can see here:
Points values are exactly 50.0000, 49.9999, 49.9998 and 50.0001. But they are not on lines. And when I add point and with it increase number of values on y-axis, then points would fit y-axis, like in this picture.
Here is my code (sorry for Serbian text values)
TacnostVage tacnost = bazaPodataka.UcitajTacnostVage(Convert.ToString(dataGridView2.SelectedRows[0].Cells[2].Value), Convert.ToInt32(comboBox18.Text));
List<TestTacnostVage> testoviTacnost = bazaPodataka.UcitajTestoveTacnostVage(Convert.ToString(dataGridView2.SelectedRows[0].Cells[2].Value), Convert.ToInt32(comboBox18.Text));
chart2.ChartAreas.Clear();
chart2.Series.Clear();
prikažiToolStripMenuItem.DropDownItems.Clear();
tabeluToolStripMenuItem.DropDownItems.Clear();
string format = Convert.ToString(vaga.Podeljak);
format = format.Remove(format.Length - 1, 1) + "0";
if (testoviTacnost.Count != 0)
{
for (int i = 0; i < tacnost.NominalneMase.Count(); i++)
{
ChartArea area = new ChartArea();
Series series = new Series();
area.AxisY.MajorGrid.LineColor = Color.LightGray;
area.AxisX.MajorGrid.LineColor = Color.LightGray;
area.AxisY.LabelStyle.Format = format;
area.BorderColor = Color.LightGray;
area.BorderDashStyle = ChartDashStyle.Solid;
area.AxisY.Interval = vaga.Podeljak;
area.Name = "ChartArea" + (i + 1);
series.ChartType = SeriesChartType.Point;
series.ChartArea = "ChartArea" + (i + 1);
series.Name = "Tačka" + (i + 1);
string text = "";
TegoviTacnostVaga tegoviTacnost = bazaPodataka.UcitajTegoveTacnostVage(Convert.ToString(dataGridView2.SelectedRows[0].Cells[2].Value), Convert.ToInt32(comboBox18.Text), i);
if (tegoviTacnost != null)
{
for (int j = 0; j < tegoviTacnost.Proizvodjac.Count(); j++)
{
text += tegoviTacnost.Proizvodjac[j] + " ";
text += tegoviTacnost.SerijskiBrojevi[j] + " ";
text += tegoviTacnost.NominalneMase[j] + "g";
text += (j == tegoviTacnost.Proizvodjac.Count() - 1 ? "" : "\n");
}
}
series.LegendText = (text == "" ? "Nema podataka" : text);
for (int j = 0; j < testoviTacnost.Count(); j++)
series.Points.AddXY(testoviTacnost[j].RedniBrojTesta, testoviTacnost[j].RezultatiMerenja[i]);
area.AxisY.StripLines.Add(new StripLine() { BorderColor = Color.Red, IntervalOffset = (tacnost.RezultatiMerenja[i].Average() + koeficijentTacnost * ponovljivost.ReferentnaVrednost), Text = "Gornja granica: " + Convert.ToDouble(tacnost.RezultatiMerenja[i].Average() + koeficijentTacnost * ponovljivost.ReferentnaVrednost).ToString(format) });
area.AxisY.StripLines.Add(new StripLine() { BorderColor = Color.Red, IntervalOffset = (tacnost.RezultatiMerenja[i].Average() - koeficijentTacnost * ponovljivost.ReferentnaVrednost), Text = "Donja granica: " + Convert.ToDouble(tacnost.RezultatiMerenja[i].Average() - koeficijentTacnost * ponovljivost.ReferentnaVrednost).ToString(format) });
area.AxisY.Maximum = area.AxisY.StripLines[0].IntervalOffset + area.AxisY.Interval;
if (series.Points.FindMaxByValue().YValues[0] >= area.AxisY.Maximum)
area.AxisY.Maximum = series.Points.FindMaxByValue().YValues[0] + area.AxisY.Interval;
area.AxisY.Minimum = area.AxisY.StripLines[1].IntervalOffset - area.AxisY.Interval;
if (series.Points.FindMinByValue().YValues[0] <= area.AxisY.Minimum)
area.AxisY.Minimum = series.Points.FindMinByValue().YValues[0] - area.AxisY.Interval;
chart2.ChartAreas.Add(area);
chart2.Series.Add(series);
}
}

I found solution, but I'm not sure if this explanation is true. The problem was Axis-Y maximum. Charts Axis-Y interval was 0.0001 (4 decimals), but in my code, I put maximum to be StripLines IntervalOffset (which was more than 4 decimals) plus Charts Interval (in result that is more than 4 decimals). So probably this happens when your Chars Axis-Y Maximum and your Interval (if you set Interval) have different number of decimals. So I just simply rounded Strip Lines InvervalOffset to 4 decimals (in this case), and put Axis-Y Maximum to have 4 decimals like Interval has.

Lining up multiplication table

private void multiBtn_Click(object sender, EventArgs e)
{
for (int a = 1; a <= 10; a++)
for (int b = 1; b <= 10; b++)
lblTable.Text = (a + " * " + b + " = " + (a * b));
for (int a = 1; a <= 10; a++)
for (int b = 1; b <= 10; b++)
lblTable.Text += (a + " * " + b + " = " + (a * b));
}
It's doing exactly what I want it to do when it comes to multiplying. It's just not lined up in rows. It prints out the multiplication for integers 1 to 10. I just need them in rows and columns, could anyone explain to me how to do that through a label. really don't know how to explain what it's doing but in my gui it prints out like "10*10=1001*1=11*2=21*3=3" and so on it just keeps going like that. I'm not even sure why it starts out with 10*10=100

Try using the newline character, which will put each item on a new row. For columns, it is a little trickier. Using a fixed width font and some padding around the numbers should do.
First, the newline code addition:
lblTable.Text += (a + " * " + b + " = " + (a * b) + "\n");
Or, a preferred format for many is to use string.Format for the string:
lblTable.Text += (string.Format("{0} * {1} = {2}\n", a, b, (a * b)));
To get them to align, you can use the PadLeft string method. In the example below, I am assuming that a and b will have less than or equal to two digits, and a * b will have less than or equal to 3 digits (remember this will only work if you use a fixed-width font, like Consolas):
for (int a = 1; a <= 10; a++)
{
for (int b = 1; b <= 10; b++)
{
lblTable.Text += (string.Format("{0} * {1} = {2}\n",
a.ToString().PadLeft(2),
b.ToString().PadLeft(2),
(a * b).ToString().PadLeft(3)));
}
}

It's pretty unclear what it is exactly you want. But note that you can insert newline characters between each line (Environment.NewLine) to force a line-break, to have text displayed on successive rows (lines) in the Label.
For example:
lblTable.Text += a + " * " + b + " = " + (a * b) + Environment.NewLine;