Why this program showing error?plzzz solve my error

Question

class box
{
double l,b,h,v;
void input(double x,double y,double z)
{
l= x;
b= y;
h= z;
}
void vol()
{
v= (l*b*h);
}
}
class cylinder
{
double r,h,v;
void input(double x,double y)
{
r= x;
h= y;
}
void vol
{
v= 3.14*r*r*h;
}
}
class computevol
{
static void addvol(box v1,cylinder v2)
{
computevol ob= new computevol();
ob.v= v1.v+v2.v;
System.out.println(ob.vol);
}
public static void main(String args[])
{
box b1= new box();
b1.input(4.0,2.0,1.0);
b1.vol();
cylinder b2= new cylinder();
b2.input(3.0,7.0);
b2.vol

Answer 1

Sandeep Awasthi

https://code.sololearn.com/c6g1Lq7H3FrJ/?ref=app

i correct your error
this mighy help you

Answer 2

most of them are syntax errors
make sure that you close all open braces
and some missing semicolon and invalid function calls

Answer 3

Sreejith now u can check my code

https://code.sololearn.com/cBB18MxgRfDU/?ref=app

Answer 4

Sandeep Awasthi
line no. 32: remove it and add this
double vol;

line no. 34: remove ob from println function

Answer 5

no of palindrome in the sentence