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Check common elements of two-dimensional arrays of integers, considering the positions they are on

at the beginning I want to mention that I am a beginner in programming. So, I want to write a program that checks the similarity of two-dimensional arrays of integers. The similarity is to be determined by the amount of numbers that are in the same positions in both tables. The user gives the number of columns in the table and the elements themselves, number of rows is the same all the time.The similarity result is displayed as a percentage and the similarity itself should be calculated taking into account the number of elements of the larger array. My problem is: When the two arrays are the same size, the program throws the exception and it doesn't check all the numbers in the column.(I wrote before program for one dimensional array and it works perfectly) So far I have managed to write something like this:
This is what I want to do In the picture, the similarity between the arrays is 20%
{
Console.WriteLine("How extensive is the first table supposed to be?");
int n = int.Parse(Console.ReadLine());
int z = 2;
int[,] tab1 = new int[2, n];
Console.WriteLine("Enter the numbers into the first array:");
for (int i = 0; i < z; i++)
{
for (int j = 0; j < n; j++)
{
tab1[i, j] = int.Parse(Console.ReadLine());
}
}
Console.WriteLine("\n");
int rowLength = tab1.GetLength(0);
int colLength = tab1.GetLength(1);
for (int i = 0; i < rowLength; i++)
{
for (int j = 0; j < colLength; j++)
{
Console.Write(string.Format("{0} ", tab1[i, j]));
}
Console.Write(Environment.NewLine + Environment.NewLine);
}
Console.WriteLine("How extensive is the second table supposed to be?");
int m = int.Parse(Console.ReadLine());
int b = 2;
int[,] tab2 = new int[2, m];
Console.WriteLine("Enter the numbers into the second array: ");
for (int i = 0; i < b; i++)
{
for (int j = 0; j < m; j++)
{
tab2[i, j] = int.Parse(Console.ReadLine());
}
}
Console.WriteLine("\n");
int Len4gth = tab2.GetLength(0);
int Len2gth = tab2.GetLength(1);
for (int i = 0; i < Len4gth; i++)
{
for (int j = 0; j < Len2gth; j++)
{
Console.Write(string.Format("{0} ", tab2[i, j]));
}
Console.Write(Environment.NewLine + Environment.NewLine);
}
double similarity= 0;
if (tab1.GetLength(1) > tab2.GetLength(1))
{
for (int i = 0; i < tab2.GetLength(1); i++)
{
for (int j = 0; j < z; j++)
{
if (tab1[i, j] == tab2[i, j])
{
similarity+= 1;
}
}
}
}
if (tab1.GetLength(1) < tab2.GetLength(1))
{
for (int i = 0; i < tab1.GetLength(1); i++)
{
for (int j = 0; j < z; j++)
{
if (tab2[i, j] == tab1[i, j])
{
similarity+= 1;
}
}
}
}
if (tab1.GetLength(1) == tab2.GetLength(1))
{
for (int i = 0; i < tab1.GetLength(1); i++)
{
for (int j = 0; j < z; j++)
{
if (tab1[i, j] == tab2[i, j])
{
similarity+= 1;
}
}
}
}
if (tab1.Length < tab2.Length)
{
Console.WriteLine("The similarity of the arrays is: " + (similarity/ tab2.Length) * 100 + "%");
}
if (tab1.Length > tab2.Length)
{
Console.WriteLine("The similarity of the arrays is: " + (similarity/ tab1.Length) * 100 + "%");
}
if (tab1.Length == tab2.Length)
{
Console.WriteLine("The similarity of the arrays is: " + (similarity/ tab2.Length) * 100 + "%");
}
Console.ReadKey();

You must compare each element of the first array with the elements of the second array.
use this code :
//get first array items
Console.WriteLine("How extensive is the first table supposed to be?");
int n = int.Parse(Console.ReadLine());
int[,] tab1 = new int[2, n];
Console.WriteLine("Enter the numbers into the first array:");
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < n; j++)
{
tab1[i, j] = int.Parse(Console.ReadLine());
}
}
Console.WriteLine("\n");
//write first array items
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < n; j++)
{
Console.Write(string.Format("{0} ", tab1[i, j]));
}
Console.Write(Environment.NewLine + Environment.NewLine);
}
//get second array items
Console.WriteLine("How extensive is the second table supposed to be?");
int m = int.Parse(Console.ReadLine());
int[,] tab2 = new int[2, m];
Console.WriteLine("Enter the numbers into the second array: ");
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < m; j++)
{
tab2[i, j] = int.Parse(Console.ReadLine());
}
}
//write second array items
Console.WriteLine("\n");
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < m; j++)
{
Console.Write(string.Format("{0} ", tab2[i, j]));
}
Console.Write(Environment.NewLine + Environment.NewLine);
}
//find similarity items
double similarity = 0;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < n; j++)
{
int firstValue = tab1[i, j];
for (int k = 0; k < 2; k++)
{
for (int d = 0; d < m; d++)
{
if (firstValue == tab2[k, d])
{
similarity += 1;
}
}
}
}
}
double percentage = n > m ? ((similarity / tab1.Length) * 100) : ((similarity / tab2.Length) * 100);
Console.WriteLine("The similarity of the arrays is: " + percentage + "%");
Console.ReadKey();
this code work without error and It does not matter which array is larger.
If you want similar elements like this example enter link description here, use this code snippet to find similar elements
//find similarity items
double similarity = 0;
int z = n > m ? m : n;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < z; j++)
{
if (tab1[i, j] == tab2[i, j])
{
similarity += 1;
}
}
}
double percentage = n > m ? ((similarity / tab1.Length) * 100) : ((similarity / tab2.Length) * 100);
Console.WriteLine("The similarity of the arrays is: " + percentage + "%");
Console.ReadKey();

Magic Square Code Single Even number in C#

can you help me to create a logic for magic square metric. In given example, I have created a code for generate Magic Square for odd numbers like 3x3, 5x5, 7x7 metric and double even numbers like 4×4 , 8×8 but unable to found a proper solution for create single even value magic square metric like 6x6, 10x10 etc.
In current implementation anyone can enter a number (n) in input and it will create a nxn magic square metric. But not working fine with single even numbers
class Program
{
public static void Main(string [] args )
{
Console.WriteLine("Please enter a number:");
int n1 = int.Parse(Console.ReadLine());
// int[,] matrix = new int[n1, n1];
if (n1 <= 0)
{
Negativ();
}
else if (n1 == 2)
{
Zwei();
}
else if ((n1 != 2) && !(n1 < 0) && (n1 % 2 != 0))
{
Odd (n1 );
}
else if ((n1 != 2) && !(n1 < 0) && ((n1 - 2) % 4 == 0))
{//singl Even
SingleEven(n1);
}
else if ((n1 != 2) && !(n1 < 0) && (n1 % 4 == 0))
{
DoubleEven (n1);
}
}
private static void Negativ(){
Console.WriteLine("Sorry, the number must be positive and greater than 3 ");
Console.ReadLine();
}
public static void Zwei(){
Console.WriteLine("Sorry,there is no magic square of 2x2 and the number must be and greater than 3 ");
Console.ReadLine();
}
public static void Odd ( int n)// odd method
{
int[,] magicSquareOdd = new int[n, n];
int i;
int j;
// Initialize position for 1
i = n / 2;
j = n - 1;
// One by one put all values in magic square
for (int num = 1; num <= n * n; )
{
if (i == -1 && j == n) //3rd condition
{
j = n - 2;
i = 0;
}
else
{
//1st condition helper if next number
// goes to out of square's right side
if (j == n)
j = 0;
//1st condition helper if next number is
// goes to out of square's upper side
if (i < 0)
i = n - 1;
}
//2nd condition
if (magicSquareOdd[i, j] != 0)
{
j -= 2;
i++;
continue;
}
else
{
//set number
magicSquareOdd[i, j] = num++;
//1st condition
j++; i--;
}
}
// print magic square
Console.WriteLine("The Magic Square for " + n + " is : ");
Console.ReadLine();
for ( i = 0; i < n; i++)
{
for ( j = 0; j < n; j++)
Console.Write(" " + magicSquareOdd[i, j] + " ");
Console.WriteLine();
Console.ReadLine();
}
Console.WriteLine(" The sum of each row or column is : " + n * (n * n + 1) / 2 + "");
Console.ReadLine();
}
public static void SingleEven(int n )
{
// int n = magic .Length ;
int[,] magicSquareSingleEven = new int[n, n];
int halfN = n / 2;
int k = (n - 2) / 4;
int temp;
int[] swapcol = new int[n];
int index = 0;
int[,] minimagic = new int[halfN, halfN];
*Odd(minimagic) ;* // here is the problem
for (int i = 0; i < halfN; i++)
for (int j = 0; j < halfN; j++)
{
magicSquareSingleEven[i, j] = minimagic[i, j];
magicSquareSingleEven[i+ halfN , j+halfN ] = minimagic[i, j]+ halfN *halfN ;
magicSquareSingleEven[i, j + halfN] = minimagic[i, j] +2* halfN * halfN;
magicSquareSingleEven[i + halfN, j] = minimagic[i, j] +3* halfN * halfN;
}
for (int i =1; i< k ;i ++)
swapcol [index ++]=i ;
for (int i = n-k+2; i <= n ; i++)
swapcol[index++] = i;
for (int i =1; i<=halfN ;i ++)
for (int j = 1; j<= index ; j ++)
{
temp = magicSquareSingleEven[i - 1, swapcol[j - 1] - 1];
magicSquareSingleEven[i-1,swapcol[j-1]-1]=magicSquareSingleEven[i +halfN-1,swapcol[j-1]-1];
magicSquareSingleEven[i+halfN-1,swapcol[j-1]-1]=temp;
}
//swaping noses
temp=magicSquareSingleEven[k,0];
magicSquareSingleEven[k,0]=magicSquareSingleEven[k+halfN,0];
magicSquareSingleEven[k+halfN,0]=temp;
temp=magicSquareSingleEven[k+halfN,k];
magicSquareSingleEven[k+halfN,k]=magicSquareSingleEven[k,k];
magicSquareSingleEven[k,k]=temp;}
//end of swaping
// print magic square
Console.WriteLine("The Magic Square for " + n + " is : ");
Console.ReadLine();
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
Console.Write(" " + magicSquareSingleEven[i, j] + " ");
Console.WriteLine();
Console.ReadLine();
}
Console.WriteLine(" The sum of each row or column is : " + n * (n * n + 1) / 2 + "");
Console.ReadLine();
}

Need help fixing placement of drawn paterns in console application

So the user has a choice of 3 possible outputs:
- Draw a triangle
- Draw a rectangle
- Draw a house
I can draw all three but the output is not quiet right.
As you see in the code it draws a triangle but I need it to move more to the right.
if (keuze == 1)
{
int n = 4;
int i, j, k = 0;
for (i = 1; i <= n; i++)
{
for (j = i; j < n; j++)
{
Console.Write(" ");
}
while (k != (2 * i - 1))
{
if (k == 0 || k == 2 * i - 2)
Console.Write("*");
else
Console.Write(" ");
k++;
;
}
k = 0;
Console.WriteLine();
}
for (i = 0; i < 2 * n - 1; i++)
{
Console.Write("*");
}
Console.WriteLine();
}

Try This:
if (true)
{
int n = 4;
int i, j, k = 0;
for (i = 1; i <= n; i++)
{
for (j = i; j < n; j++)
{
Console.Write(" ");
}
while (k != (2 * i - 1))
{
if (k == 0) Console.Write(" "); //Added
if (k == 0 || k == 2 * i - 2)
Console.Write("*");
else
Console.Write(" ");
k++;
}
k = 0;
Console.WriteLine();
}
Console.Write(" "); //Added
for (i = 0; i < 2 * n - 1; i++)
{
Console.Write("*");
}
Console.WriteLine();
}

Multiplication table using 2D arrays and methods

I'm a new student having a bit of trouble with this assignment, but the powerpoint notes and other online guides don't seem to help. If anyone can give me a pointer it would be much appreciated!
private static int[,] GenerateTT(int size)
{
int[,] table = new int[size,size];
for (int i = 1; i < size+1; i++)
{
for (int j = 1; j < i+1; j++)
{
table[i-1, j-1] = i * j;
}
}
return table;
}
private static void DisplayTT(int[,] table)
{
Console.WriteLine();
Console.WriteLine("Here is the times table for that size:");
Console.WriteLine();
for (int i = 1; i <= table.Length; i++)
{
for (int j = 1; j <= i; j++)
{
Console.Write("{0}\t", table[i-1, j-1]);
}
Console.WriteLine("\n");
}
Console.WriteLine();
}
The output is supposed to be like this (if you enter 4 for example):
1 2 3 4
2 4 6 8
3 6 9 12
4 8 12 16
But what I'm getting is this, plus it crashes at DisplayTT(table):
1
2 4
3 6 9
4 8 12 16
here's the relevant part of the Main method if it helps.
int size = GetValue("Please enter the size (4-20) of the times table: ", 4, 20);
Console.WriteLine();
int[,] table = GenerateTT(size);
DisplayTT(table);

You can use GetLength(X) Property for multi dimensional arrays where X is index of dimension.
for (int i = 0; i < table.GetLength(0); i++)
{
for (int j = 0; j < table.GetLength(1); j++)
{
Console.Write("{0}\t", table[i, j]);
}
Console.WriteLine("\n");
}

You should change the inner loop hi-bound:
private static int[,] GenerateTT(int size)
{
int[,] table = new int[size,size];
for (int i = 1; i < size+1; i++)
{
for (int j = 1; j < i+1; j++) // <-- change i+1 to size+1
{
table[i-1, j-1] = i * j;
}
}
return table;
}
I'd rather keep the loops start from zero:
private static int[,] GenerateTT(int size)
{
int[,] table = new int[size,size];
for (int i = 0; i < size; i++)
{
for (int j = 0; j < size; j++)
{
table[i, j] = (i+1) * (j+1);
}
}
return table;
}

How to print star like below in console application? I/p 5 O/p like = 1 212 32123 4321234 543212345 [duplicate]

My question is how to make a pyramid using * and 'space' in C#? The output will be like this.
*
* *
* * *
* * * *
* * * * *
We only need to use "for loop" for this program. I only know how to make this one.
*
**
***
****
*****
I made a program like this:
static void Main(string[]args)
{
int i=o;
int j=o;
for(i=5;1>=1;i--)
for(j=1;j<=5;j++)
{
Console.Write("*");
}
Console.WriteLine(" ");
}
I'm confused when it comes to pyramid because it includes spaces. Thanks for your help!

think about how you'd print the pyramid manually.
suppose 5 levels deep.
1st line: 4 spaces, 1 star,
2nd line: 3 spaces, star, space, star
3rd line: 2 spaces, star space star space star
etc.
doesn't matter whether you print spaces after the last star or not - won't make a difference to how it looks.
what do we see?
if we have a total of X levels
line 1: (x-1) spaces, (star space)
line 2: (x-2) spaces, (star space) twice
line 3: (x-3) spaces, (star space) three times
line 4: (x-4) spaces, (star space) four times
that's the pattern. I'll leave the coding to you.

using System;
class Program
{
static void Main(string[] args)
{
int num, i, j, k;
Console.Write("enter the level:");
num=Convert.ToInt32(Console.ReadLine());
for (i = 1; i <= num; i++)
{
for (j = 1; j < num-i+1; j++)
{
Console.Write(" ");
}
for (k = 1; k <= i; k++)
{
Console.Write(i);
Console.Write(" ");
}
Console.WriteLine();
}
}
}

Your problem is spaces, therefore I suggest you think about the spaces. Tell me this: how many spaces are on each row to the left of the first star? You'll likely be able to solve your own problem if you think about this.

Try to think of it as a grid or a matrix and see where you want the '*' in each row and how it relates to your loop index.

sorry I missed this was homework... will give a strategy ... instead
it helps if you do it in notepad and think about what you are doing... you will start to understand the relationship between the line you are on and the spaces and what not...

Post my answer after 3 hours. I think now you have almost finished it under #iluxa's advice?
int height = 20;
for (int level = 1; level <= height; level++)
{
string text = string.Join(" ", Enumerable.Repeat("*", level));
Console.WriteLine(text.PadLeft(height - level + text.Length));
}
I used some build-in methods e.g. Enumerable.Repeat and String.PadLeft, not the pure C-language way. The purpose is that I want to tell you since you have chosen C# as the programming language(not C/Java/etc), you should resolve problems in the C# way.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace pyramid_star
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("enter a number:");
int n = Convert.ToInt32(Console.ReadLine());
for (int i = 1; i <= n; i++)
{
for (int x = i; x <= n; x++)
{
Console.Write(" ");
}
for (int j = 1; j <= i; j++)
{
Console.Write("*"+" ");
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}

using System;
using System.Collections.Generic;
using System.Text;
namespace Star_Pyramid
{
class Program
{
static void Main(string[] args)
{
Program o = new Program();
o.show();
Console.ReadKey();
}
void show()
{
for (int i = 1; i <= 12; i++)
{
for (int j = 1; j <= 9 - i / 2; j++)
{
Console.Write(" ");
}
for (int k = 1; k <= i; k++)
{
Console.Write(" * ");
Console.Write(" ");
}
Console.WriteLine();
}
}
}
}

class Program
{
static void Main(string[] args)
{
int num;
Console.WriteLine("enter level");
num = Int32.Parse(Console.ReadLine());
int count = 1;
for (int lines = num; lines >= 1; lines--)
{
for (int spaces = lines - 1; spaces >= 1; spaces--)
{
Console.Write(" ");
}
for (int star = 1; star <= count; star++)
{
Console.Write("*");
Console.Write(" ");
}
count++;
Console.WriteLine();
}
Console.ReadLine();
}
}

Try this and follow this same logic in c, c++, php, java
using System;
class pyramid {
static void Main() {
/** Pyramid stars Looking down
Comment this if u need only a upside pyramid **/
int row, i, j;
// Total number of rows
// You can get this as users input
//row = Int32.Parse(Console.ReadLine());
row = 5;
// To print odd number count stars use a temp variable
int temp;
temp = row;
// Number of rows to print
// The number of row here is 'row'
// You can change this as users input
for ( j = 1 ; j <= row ; j++ ) {
// Printing odd numbers of stars to get
// Number of stars that you want to print with respect to the value of "i"?
for ( i = 1 ; i <= 2*temp - 1 ; i++ )
Console.Write("*");
// New line after printing a row
Console.Write("\n");
for ( i = 1 ; i <= j ; i++ )
Console.Write(" ");
// Reduce temp value to reduce stars count
temp--;
}
/** Pyramid stars Looking up
Comment this if u need only a downside pyramid **/
int rowx, k, l;
// Total number of rows
// You can get this as users input
// rowx = Int32.Parse(Console.ReadLine());
rowx = 5;
// To print odd number count stars use a temp variable
int tempx;
tempx = rowx;
//Remove this if u use
Console.Write("\n");
// Number of rows to print
// The number of row here is 'rowx'
for ( l = 1 ; l <= rowx ; l++ ) {
// Leaving spaces with respect to row
for ( k = 1 ; k < tempx ; k++ )
Console.Write(" ");
// Reduce tempx value to reduce space(" ") count
tempx--;
// Printing stars
for ( k = 1 ; k <= 2*l - 1 ; k++ )
Console.Write("*");
// New line after printing a row
Console.Write("\n");
}
}
}

The following code might help:
public static void print(int no)
{
for (int i = 1; i <= no; i++)
{
for (int j = i; j <= no; j++)
{
Console.Write(" ");
}
for (int k = 1; k < i * 2; k++)
{
if(k % 2 != 0)
{
Console.Write("*");
}
else
{
Console.Write(" ");
}
}
Console.WriteLine();
}
Console.ReadLine();
}

Here I have created a number pyramid:
using System;
public class Program
{
public static void Main()
{
Console.WriteLine("This is a number pyramid....");
var rows = 5;
for(int i = 1; i <= rows; i++)
{
for(int lsc = (-rows); lsc <= -2; lsc ++)
{
if(lsc < (-1)*i)
{
//write left sided blank spaces
Console.Write(" ");
}
else
{
//write left sided numbers
Console.Write(-1*(lsc));
}
}
for(int rsc = 1; rsc <= rows; rsc++)
{
//write right sided blank spaces
Console.Write(" ");
}
else
{
//Write sided numbers
Console.Write(rsc);
}
}
Console.WriteLine();
}
}
}
I have described here https://utpalkumardas.wordpress.com/2018/04/20/draw-number-pyramid
Out put is:
The is a number pyramid....
1
212
32123
4321234
543212345

I know it's javascript but might help
let n = 6;
for (let i = 1; i <= n; i++) {
let spaces = n-i;
let str = '';
for (let j=0; j < spaces; j++) {
str+=' ';
}
for (let j=0; j < i; j++) {
str+='* ';
}
console.log(str)
}

I have found two approaches:
//1st approach
int n = 6;
for (int i = 0; i < n; i++)
{
// need to print spaces
for (int j = 0; j < n - i - 1; j++)
{
Console.Write(" ");
}
// need to print * with one space
for (int k = 0; k <= i; k++)
{
Console.Write("* ");
}
Console.WriteLine();
}
// 2nd Approach
int rows = 6;
int temp = 0;
bool toggle = false;
for (int j = 0; j < rows; j++)
{
int counter = 0;
for (int i = 0; i < 2 * rows - 1; i++)
{
if (i < rows - temp - 1)
{
Console.Write(" ");
}
else
{
if (counter <= j + temp)
{
if (!toggle)
{
Console.Write("*");
toggle = true;
}
else
{
Console.Write(" ");
toggle = false;
}
}
counter++;
}
}
Console.WriteLine();
temp++;
toggle = false;
}