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