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- using System;
- namespace Lab5
- {
- class Program
- {
- static void Arif(double[, ] matrix)
- {
- int num = 0;
- Console.WriteLine("А теперь задайте число");
- int v = Convert.ToInt16(Console.ReadLine());
- double sum = 0;
- for (int i = 0; i < matrix.GetLength(0); i++)
- for (int j = 0; j < matrix.GetLength(0); j++)
- {
- sum += matrix[i, j];
- double arif = 0;
- if (j == (matrix.GetLength(0) - 1))
- {
- arif = sum / j;
- if (arif < v)
- num++;
- sum = 0;
- }
- }
- Console.WriteLine($"Количество строк, где среднее арифметическое меньше {v} равно {num}");
- }
- static void ToTriangle(ref double[,] matrix)
- {
- double n = matrix.GetLength(0);
- Console.WriteLine(n);
- for (int i = 0; i < n - 1; i++)
- for (int j = i + 1; j < n; j++)
- {
- double koef = matrix[j, i] / matrix[i, i];
- for (int k = i; k < n; k++)
- matrix[j, k] -= matrix[i, k] * koef;
- }
- }
- static void Print(double[,] matrix)
- {
- for (int i = 0; i < matrix.GetLength(0); i++)
- {
- for (int j = 0; j < matrix.GetLength(0); j++)
- Console.Write("{0:0.0}\t", matrix[i, j]);
- Console.WriteLine();
- }
- Console.WriteLine();
- }
- static void Main()
- {
- double[,] matrix = new double[4, 4];
- var random = new Random();
- for (int i = 0; i < matrix.GetLength(0); i++)
- for (int j = 0; j < matrix.GetLength(0); j++)
- matrix[i, j] = random.Next(1, 9);
- Print(matrix);
- ToTriangle(ref matrix);
- Print(matrix);
- Arif(matrix);
- }
- }
- }
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