class Triangle{
double a,b,c;
double l,s;
public Triangle(double a,double b,double c) {
this.a = a;
this.b = b;
this.c = c;
}
public void zhochang() {
l = a+b+c;
System.out.println("周長："+l);
}
public void mianji() {
double p = (a+b+c)/2;
s = Math.sqrt((p - a)*p*(p - b)*(p - c));
System.out.println("面積："+s);
}
}
public class 三角形周長面積 {
public static void main(String[] args) {
Triangle z = new Triangle(2,2,2);
z.zhochang();
z.mianji();
}
}
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