Ceanup.

.gitignore

@@ -1,2 +0,0 @@
-Lab 1/Lab_1.class
-Lab 2/Lab_2.class

Java/Lab 1/Lab_1.java

@@ -0,0 +1,64 @@
+import java.util.Scanner;
+
+public class Lab_1 {
+    public static void main(String[] args) {
+        int n, m, a, b;
+        float s = 0;
+
+        Scanner input = new Scanner(System.in);
+        
+        do {
+            try {
+                System.out.print("Enter n: ");
+                n = input.nextInt();
+                break;
+            } catch (Exception e) {
+                System.out.println("N must be an integer.");
+                input.nextLine();
+            }
+        } while (true);
+
+        do {
+            try {
+                System.out.print("Enter m: ");
+                m = input.nextInt();
+                break;
+            } catch (Exception e) {
+                System.out.println("M must be an integer.");
+                input.nextLine();
+            }
+        } while (true);
+
+        do {
+            try {
+                System.out.print("Enter a: ");
+                a = input.nextInt();
+                break;
+            } catch (Exception e) {
+                System.out.println("A must be an integer.");
+                input.nextLine();
+            }
+        } while (true);
+
+        do {
+            try {
+                System.out.print("Enter b: ");
+                b = input.nextInt();
+                break;
+            } catch (Exception e) {
+                System.out.println("B must be an integer.");
+                input.nextLine();
+            }
+        } while (true);
+
+        input.close();
+
+        for (int i = a; i <= n; i++) {
+            for (int j = b; j <= m; j++) {
+                s += j;
+            }
+        }
+
+        System.out.println("S = " + s);
+    }
+}

Lab 1/Lab_1.java

@@ -1,41 +0,0 @@
-import java.util.Scanner;
-
-public class Lab_1 {
-    public static void main(String[] args) {
-        int n, m, a, b;
-        float s = 0;
-
-        Scanner input = new Scanner(System.in);
-        
-        System.out.print("Enter n: ");
-        n = input.nextInt();
-
-        System.out.print("Enter m: ");
-        m = input.nextInt();
-
-        do {
-            System.out.print("Enter a (can't be above n): ");
-            a = input.nextInt();
-        } while (a > n);
-
-        do {
-            System.out.print("Enter b (can't be above m): ");
-            b = input.nextInt();
-        } while (b > m);
-
-        input.close();
-
-        if ((a <= 0) && (n >= 0)) {
-            System.out.println("Error, division by zero, shutting down!");
-            System.exit(1);
-        }
-
-        for (int i = a; i < n; i++) {
-            for (int j = b; j < m; j++) {
-                s += i * j / i;
-            }
-        }
-
-        System.out.println("S = " + s);
-    }
-}

Rust/Lab 1/Lab_1.rs

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