三角形面积作业
import java.util.Scanner;
public class KeTang {
public static void main(String[] args) {
double a,b,c;
Scanner sc = new Scanner(System.in);
System.out.print("a = ");
a = sc.nextDouble();
System.out.print("b = ");
b = sc.nextDouble();
System.out.print("c = ");
c = sc.nextDouble();
if (a + b> c && a + c >b && b + c > a){
System.out.println(“a,b,c可以组成三角形”);
}else {
System.out.println(“a,b,c不能组成三角形”);
}
double p=(a+b+c)/2;
System.out.println(Math.sqrt(p*(p-a)(p-b)(p-c)));
}
}