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public class Demo6 {
public static void main(String[] args) {
A a = new A();
System.out.println(a.area(3, 4, 5));
}
}
class A {
private int a;
private int b;
private int c;
double area(int x, int y, int z) {
a = x;
b = y;
c = z;
double p = (a + b + c) / 2;
return Math.sqrt(p * (p - a) * (p - b) * (p - c));
}
}
System.out.printf("%d\t%f",aa.zhouchang(),aa.area());
aa.zhouchang()