2D array getting errors on passing variables and more...

Question

When I compile this, I get an error saying that I cannot pass my variables of pizza, type, and day. It says that it cannot have String and int[][]. Then I get errors saying that symbol cannot be resolved for my variables of type, pizza, and day when they are in my input and calculate methods of the menu class.
I am trying to set up a 2D array that has 3 rows and 7 columns, for 3 types of pizza and the days of the week. If I get it right, it should allow the user to input the # of each type of pizza sold on each day, and then total it and display the totals.
Each time I change something, I get something else weird going on. If anyone can help me figure out where I went wrong I would appreciate it.
Thanks
import java.io.*;
class my_main
     public static void main (String []args) throws IOException
     int [] [] pizza = new int [3] [7];
     String [] type = {"Cheese", "Sausage", "Pepperoni"};
     String [] day = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
     menu menupt = new menu();
     menupt.input(pizza, type, day);
     menupt.calculate(pizza, type, day);
class menu
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int col = 0;
int row = 0;
int total = 0;
int T;
     void input (String []args) throws IOException
     for (col = 0; col < 7; col++)
          for (row = 0; row < 3; row++)
               System.out.print ("Enter the number of "+type [row]+"pizzas sold on "+day[col]);
     void calculate (String []args) throws IOException
          for (col = 0; col < 7; col++)
          for (row = 0; row < 3; row++)
               T = total + pizza[row][col];
               System.out.println ("The number of "+type[row]+"pizzas sold on "+day[col]+"="+T);
          

Answer 1

When I compile this, I get an error saying that I
cannot pass my variables of pizza, type, and day. It
says that it cannot have String and int[][]. You are calling :
menupt.input(pizza, type, day);What this call is trying to do is send 3 arguments to input() - the 1st arg is a 2d int arr, the 2nd is a String arr and the 3rd is a String arr i.e int[][], String[], String[]
But the input() method is declared like this:
void input (String []args) throws IOExceptionAccording to this signature, input() takes only 1 argument - String arr, not 3 args that you are trying to pass to it.
Hence the compile error.
Then I
get errors saying that symbol cannot be resolved for
my variables of type, pizza, and day when they are in
my input and calculate methods of the menu class.Really?
void input (String []args) throws IOException
for (col = 0; col < 7; col++)
for (row = 0; row < 3; row++)
System.out.print ("Enter the number of "+type [row]+"pizzas sold on "+day[col]);
}Where are the vars type, pizza & day in the input() method? The only vars that it knows about are :
1. args - the string array argument that is passed to it.
2. col
3. row
Each time I change something, I get something else
weird going on. If anyone can help me figure out
where I went wrong I would appreciate it. First try to understand the following:
what variables are
what variable scope means
what scopes are possible
how to pass arguments to methodsThen a light bulb will turn on in your head with regard to these problems/errors.