Revert "Done lab 1-3"

This reverts commit 29e63163a4.

.gitignore

@@ -0,0 +1,2 @@
+# Project exclude paths
+/out/

OOP_IO-2x_2023.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

lab1_with_extracted_method/Program.cs

@@ -1,61 +0,0 @@
-using System;
-
-public class Lab1
-{
-    public static void Main(String[] args)
-    {
-        /*o1 = +
-         c3 = 0
-         o2 = *
-         c7 = short */
-
-        // var A = 4;
-        // short B = 3;
-        // var N = 10;
-        // var M = 10;
-        //
-        // var C = 1;
-        // var s = 0;
-        //
-        // bool divisionByZero=false;
-
-
-        Calculation(4, 3, 10, 10, 1, false);
-    }
-
-    public static void Calculation(int A, int C, int N, short B, int M, bool divisionByZero)
-    {
-        var s = 0;
-        if ((A <= -C && -C <= N) || (B <= 0 && 0 <= M))
-        {
-            Console.WriteLine("Division by zero!");
-            return;
-        }
-
-        for (int i = A; i <= N; i++)
-        {
-            if (i + C == 0)
-            {
-                Console.WriteLine("Division by zero!");
-                divisionByZero = true;
-                break;
-            }
-
-            for (short j = B; j <= M; j++)
-            {
-                if (j == 0)
-                {
-                    Console.WriteLine("Оскільки j = 0, то сума просто буде 0");
-                    break;
-                }
-
-                s += (i * j) / (i + C);
-            }
-        }
-
-        if (!divisionByZero)
-        {
-            Console.WriteLine($"s = {s};");
-        }
-    }
-}

laboratorna1/Program.cs

@@ -1,52 +0,0 @@
-using System;
-
-public class Lab1
-{
-    public static void Main(String[] args)
-    {
-        /*o1 = +
-         c3 = 0
-         o2 = *
-         c7 = short */
-
-         var A = 4;
-         short B = 3;
-         var N = 10;
-         var M = 10;
-
-         var C = 1;
-         var s = 0;
-
-         bool divisionByZero=false;
-
-
-        if ((A <= -C && -C <= N) || (B <= 0 && 0 <= M))
-        {
-            Console.WriteLine("Division by zero!");
-            return;
-        }
-      
-        for (int i = A; i <= N; i++)
-        {
-            if (i + C == 0) { 
-                Console.WriteLine("Division by zero!");
-                divisionByZero = true;
-                break; 
-            }
-            for (short j = B; j <= M; j++)
-            {
-                if (j == 0) {
-                    Console.WriteLine("Оскільки j = 0, то сума просто буде 0");
-                    break;
-                }
-                s += (i * j) / (i + C);
-            }
-        }
-
-        if (!divisionByZero)
-        {
-            Console.WriteLine($"s = {s};" );
-        }
-
-    }
-}

src/Lab2.java

@@ -1,13 +1,36 @@
 public class Lab2 {
     public static void main(String[] args) {
-        int[] array = {1, 2, 3};
+        final int A = 2;
-        /*for (int i = 0; i < array.length; i++) {
+        final int[][] MATRIX_B = {
+                {1, 202, 1, 1, 202, 3, 1, 202, 3,},
+                {1, 202, 1, 1, 202, 3, 1, 202, 3,},
+                {1, 1,   3, 1, 202, 3, 1, 202, 3,},
+//                {4, 5, 6,},
+        };
+
+        int[][] MATRIX_C = multiplication(A, MATRIX_B);
+
+        print(MATRIX_C);
+
+        System.out.println("Sum of smallest elements in every column: " + sumOfSmallestElementsInEveryColumn(MATRIX_C));
+
+        /*int[] array = {1, 2, 3};
+        int[] array2 = new int[3];
+        Object[] array3 = new String[3];
+        System.out.println(array3[0]); //nothing, trash from the memory, null || null
+        System.out.println(array2[0]); //nothing, trash from the memory, null || 0
+        System.out.println(array[0]); // || 1
+
+        int[][] matrix2 = new int[2][3];
+        matrix2[0] = new int[2];
+        matrix2[1] = new int[1];
+        for (int i = 0; i < array.length; i++) {
             if (i % 2 == 0) {
                 System.out.println("!" + array[i]);
             } else {
                 System.out.println("?" + array[i]);
             }
-        }*/
+        }
 
         for (int i = 0; i < array.length; i+=2) {
             System.out.println("!" + array[i]);
@@ -22,5 +45,58 @@ public class Lab2 {
                 {1, 2},
                 {3}
         };
+
+//        C=a×B, a - const
+
+
+//        final int[][] MATRIX_C = int;
+
+
+        MATRIX_B[0][0] = 2;
+        MATRIX_B[0] = new int[]{1, 2};
+        System.out.println(MATRIX_B[0][0]);
+        MATRIX_B = new int[][]{
+                {1, 2},
+                {3}
+        };*/
+    }
+
+    private static int sumOfSmallestElementsInEveryColumn(final int[][] MATRIX_C) {
+//        todo check different length of rows
+//        todo try to change i and j
+//        todo check repetition of minimal elements
+        int sum = 0;
+        for (int i = 0; i < MATRIX_C[0].length; i++) {
+            int tmpSmallest = MATRIX_C[0][i];
+            for (int j = 1; j < MATRIX_C.length; j++) {
+                if (MATRIX_C[j][i] < tmpSmallest) {
+                    tmpSmallest = MATRIX_C[j][i];
+                }
+            }
+            sum += tmpSmallest;
+        }
+        return sum;
+    }
+
+    private static void print(final int[][] MATRIX_C) {
+        for (int i = 0; i < MATRIX_C.length; i++) {
+            for (int j = 0; j < MATRIX_C[i].length; j++) {
+//                System.out.print(MATRIX_C[i][j] + "\t");//printf("%4d",
+                System.out.printf("%4d ", MATRIX_C[i][j]);//printf("%4d",
+            }
+            System.out.println();
+        }
+    }
+
+    private static int[][] multiplication(int A, final int[][] MATRIX_B) {
+        final int[][] MATRIX_C = new int[MATRIX_B.length][/*MATRIX_B[0].length*/]; // todo !!!DANGER different lengths of rows
+//        final int[][] MATRIX_C = MATRIX_B;
+        for (int i = 0; i < MATRIX_B.length; i++) {
+            MATRIX_C[i] = new int[MATRIX_B[i].length];
+            for (int j = 0; j < MATRIX_B[i].length; j++) {
+                MATRIX_C[i][j] = MATRIX_B[i][j] * A;
+            }
+        }
+        return MATRIX_C;
     }
 }