Lab 1.

.gitignore

@@ -1,2 +1,3 @@
-# Project exclude paths
-/out/
+Java/Lab 1/Lab_1.class
+.gitignore
+Java/Lab 2/Lab_2.class

Java/Lab 1/Lab_1.java

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+import java.util.Scanner;
+
+public class Lab_1 {
+
+    public static int protectedInput(String variable_to_read, Scanner input) {
+        int read_variable;
+        do {
+            try {
+                System.out.printf("Enter %s: ", variable_to_read);
+                read_variable = input.nextInt();
+                break;
+            } catch (Exception e) {
+                System.out.printf("%s must be an integer.\n", variable_to_read.toUpperCase());
+                input.nextLine();
+            }
+        } while (true);
+        return read_variable;
+    }
+
+    public static void main(String[] args) {
+        int n, m, a, b;
+
+        Scanner input = new Scanner(System.in);
+
+        n = protectedInput("n", input);
+
+        m = protectedInput("m", input);
+
+        a = protectedInput("a", input);
+
+        b = protectedInput("b", input);
+
+        input.close();
+
+        float s = ((float) (b + m) / 2) * (m - b + 1) * (n - a + 1);
+
+        System.out.println("S = " + s);
+    }
+}

Java/Lab 2/Lab_2.java

@@ -0,0 +1,106 @@
+import java.util.Scanner;
+
+public class Lab_2 {
+
+    public static short protectedInput(String inputPrompt, String errorMessage, Scanner input) {
+        short read_variable;
+
+        do {
+            try {
+                System.out.println();
+                System.out.print(inputPrompt);
+
+                read_variable = input.nextShort();
+                break;
+            } catch (Exception e) {
+                System.out.println(errorMessage);
+                input.nextLine();
+            }
+        } while (true);
+
+        return read_variable;
+    }
+
+    public static String format(int number) {
+        int width = String.valueOf(number).length() + 1;
+        String format = "|%" + width + "d ";
+
+        return format;
+    }
+
+    public static double average(short[] row) {
+        short sum = 0;
+
+        for (short element : row) {
+            sum += element;
+        }
+
+        double result = sum / row.length;
+
+        return result;
+    }
+
+    public static void main(String[] args) {
+        short a, rows = 0, columns = 0;
+        String format;
+
+        Scanner input = new Scanner(System.in);
+
+        a = protectedInput("Input a constant to multipy a matrix by: ",
+                "A constant must be a short-data type integer, try again.", input);
+
+        System.out.println();
+        System.out.println("Input size of the matrix.");
+
+        do {
+            rows = protectedInput("Rows: ",
+                    "A number of rows must be a short-data type integer, try again.", input);
+        } while (rows <= 0);
+
+        do {
+            columns = protectedInput("Columns: ",
+                    "A number of columns must be a short-data type integer, try again.", input);
+        } while (columns <= 0);
+
+        input.close();
+
+        short[][] matrix_B = new short[rows][columns];
+
+        System.out.println();
+        System.out.println("Matrix B:");
+
+        format = format(rows * columns);
+
+        for (short i = 0; i < rows; i++) {
+            for (short j = 0; j < columns; j++) {
+                matrix_B[i][j] = (short) ((i + 1) * (j + 1));
+
+                System.out.printf(format, matrix_B[i][j]);
+            }
+
+            System.out.println("|");
+        }
+
+        System.out.println();
+        System.out.println("Matrix a×B:");
+
+        format = format(rows * columns * a);
+
+        for (short i = 0; i < matrix_B.length; i++) {
+            for (short j = 0; j < matrix_B[i].length; j++) {
+                matrix_B[i][j] *= (short) (a);
+
+                System.out.printf(format, matrix_B[i][j]);
+            }
+
+            System.out.println("|");
+        }
+
+        System.out.println();
+        System.out.println("Averages of each row:");
+
+        for (short[] row : matrix_B) {
+            System.out.println(average(row));
+        }
+    }
+}

Rust/Lab 1/Lab_1.rs

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+fn main() {
+
+}

Rust/Lab 2/Lab_2.rs

@@ -0,0 +1,3 @@
+fn main() {
+    
+}