Java计算扇形面积
import java.util.Scanner;
public class SectorAreaCalculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入扇形半径：");
double radius = scanner.nextDouble();
System.out.print("请输入扇形圆心角（角度）：");
double angle = scanner.nextDouble();
double sectorArea = (angle / 360) * Math.PI * radius * radius;
System.out.println("扇形面积为：" + sectorArea);
scanner.close();
}
}