FINDING THE AREA OF TRIANGLE

class triangle
{
double a,b,c;
void get (double x, double y, double z)
{
a=x;
b=y;
c=z;
}
double cal();
{
double s.area
s=(a+b+c)/2;
area=math(area);
}
}
class ex triangle
{
public static void main(string args[])
{
triangle ot=new triangle();
ot.get93.5,4.2,5.4);
double=ot.cal();
system.out.println("area of triangle :" +a+);
}
}