Problem with matrix

[plsoft]

Hi guys, i'm new to C#. I have been trying to create a matrix or size 3x3 with the following code:

using System;
class matrix
    {
        static void Main(string[] args)
        {
            Console.Write("Enter values for the matrix: ");
            int [,]matrx=new int[3,3];
            for(int i=0;i<3;i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    matrx[i, j] = Console.Read();
                }
            }
            for(int i=0;i<3;i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    Console.Write(" " +matrx[i, j]);
                }
                Console.WriteLine();
            }
        }
    }

The problem is that it accepts only 3(should be 9) values but gives an output of complete 3x3 matrix with random values. For eg. if i entered the first three numbers (elements) as 1,2 & 3 (after which the loop exits itself n goes to the output), it gives the following output:

Enter values for the matrix: 1
2 
3

49 13 10
50 13 10
51 13 10
Press any key to continue...

It is my belief that the problem is with the Console.Read() line. However, i would be really grateful if you guys point out as to why i'm not getting the desired result. Thanking you all in advance.

[Ramy Mahrous]

modifiy your code to this

Console.Write("Enter values for the matrix: ");
int[,] matrx = new int[3, 3];
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
matrx[i, j] = int.Parse(Console.ReadLine());
}
}

[plsoft]

Thanks so much @RamyMahrous, the code you gave worked flawless..:icon_cheesygrin:
Repped ya.

[danerd]

Thanks so much @RamyMahrous, the code you gave worked flawless..:icon_cheesygrin:
Repped ya.

yes this is perfect

[Aydinozkan]

using System;
namespace Matrix 
{ 
    public class matrix 
    { 
        public static void Main(string[] args) 
        { 
            int i; int j; int[,] matrix = new int[3, 3]; 
            for (i = 0; i < 3; i++) 
            { 
                for (j = 0; j < 3; j++) 
                { 
                    Console.Write("Enter integer :"); 
                    matrix[i, j] = int.Parse(Console.ReadLine()); 
                } 
            } 
            System.Console.Clear();
            for (i = 0; i < 3; i++) 
            {
                for (j = 0; j < 3; j++) 
                { 
                    Console.Write("{0} ", matrix[i, j]);
                }
                Console.Write("\n");
            } 
            Console.Read();
        }
    }
}

[ddanbe]

BTW Hi Ramy!:)

@plsoft
The numbers
49 13 10
50 13 10
51 13 10
Are not so random as you think. They are ASCII codes.
49 = '1'
50 = '2'
51 = '3'
13 = 'cr' or '\n'
10 = 'lf' or '\r'

[nndung179]

CMatrix.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Matrix
{
    class CMatrix
    {
        private int[,] a;
        private int r, c;
        
        public void Input()
        {
            Console.Write("Input number of row: ");
            this.r = Convert.ToInt32(Console.ReadLine());
            Console.Write("Input number of column: ");
            this.c = Convert.ToInt32(Console.ReadLine());

            this.a = new int[r, c];
            for (int i = 0; i < this.r; i++)
            {
                for (int j = 0; j < this.c; j++)
                {
                    Console.Write("Nhap phan tu a[{0}, {1}]: ", i+1, j+1);
                    a[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }
        }
        public void Output()
        {
            Console.WriteLine("\nResult: \n");
            for (int i = 0; i < r; i++)
            {
                for (int j = 0; j < c; j++)
                {
                    Console.Write("{0}\t", a[i, j]);
                }
                Console.WriteLine("\n");
            }
        }

    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Program
{
    using Matrix;
    class Program
    {
        static void Main(string[] args)
        {
            CMatrix m = new CMatrix();
            m.Input();
            m.Output();
        }
    }
}

Good Luck

[Taruna Malik]

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication14
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] mat1=new int[3,3];
            int[,] mat2 = new int[3, 3];
            int[,] mat3 = new int[3, 3]; 
            int i, j;
            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    Console.WriteLine("enter data for matrix 1");
                    mat1[i,j] = Convert.ToInt32(Console.ReadLine());
                }
            }


            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    Console.Write(mat1[i,j]);
                }
                Console.Write("\n");
            }

            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    Console.WriteLine("enter data for matrix 2");
                    mat2[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }


            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    Console.Write(mat2[i, j]);
                }
                Console.Write("\n");
            }

            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    mat3[i, j] = mat1[i, j] + mat2[i, j];
                }
                Console.Write("\n");
            }

            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    Console.Write(mat3[i, j]);
                }
                Console.Write("\n");
            }
            Console.ReadLine();
        }
    }
}

[Taruna Malik]

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication15
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] mat = new int[3, 4];
            int i, j;
            int sum=0;
            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    Console.WriteLine("enter values for matrix 1");
                    mat[i, j] = Convert.ToInt32(Console.ReadLine());
                }
            }
            for (i = 0; i < 3; i++)
            {
                for (j = 0; j < 3; j++)
                {
                    sum = sum + mat[i, j];
                    Console.Write(mat[i, j]);
                }
                Console.Write(sum);
                Console.Write("\n");
                sum = 0;
            }
            Console.ReadLine();
        }
    }
}

[1189903065]

hi..can i know the code to write the output of the above mentioned into a file..

[Ishwarya...]

sir i need to find eigenvectors and values for the 3x3 martix its really hard to find it for me... can u pls provide me how to find using program plz...!!!!:-) for the matrix A=
0.08284 0.0204 0.0198
0.0204 0.03704 0.0926
0.0198 0.0926 0.03704