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