Matrix Addition and Subtraction

import java.util.Scanner;
class MatrixAddSub{
        static int r, c, A[][], B[][], C[][];
        static Scanner sc = new Scanner(System.in);
        static void input(){
                int i, j;
                System.out.print("\nRows: ");
                r = sc.nextInt();
                System.out.print("\nColoumns: ");
                c = sc.nextInt();
                A = new int[r][c];
                B = new int[r][c];
                C = new int[r][c];
                System.out.println("Enter the elements of A:-");
                for(i = 0; i < r;  i++)
                        for(j = 0; j < c; j++)
                                A[i][j] = sc.nextInt();
                System.out.println("Enter the elements of B:-");
                for(i = 0; i < r;  i++)
                        for(j = 0; j < c; j++)
                                B[i][j] = sc.nextInt();
        }
        static void negate(){
                int i, j;
                for(i = 0; i < r;  i++)
                        for(j = 0; j < c; j++)
                                B[i][j] = -B[i][j];
        }
        static void add(){
                int i, j;
                for(i = 0; i < r;  i++)
                        for(j = 0; j < c; j++)
                                C[i][j] = A[i][j] + B[i][j];
        }
        static void output(){
                int i, j;
                System.out.println("Matrix A is :-");
                for(i = 0; i < r;  i++){
                        for(j = 0; j < c; j++)
                                System.out.print(A[i][j]+" ");
                        System.out.println();
                }
                System.out.println("Matrix B is :-");
                for(i = 0; i < r;  i++){
                        for(j = 0; j < c; j++)
                                System.out.print(B[i][j]+" ");
                        System.out.println();
                }
                System.out.println("The result is:-");
                for(i = 0; i < r;  i++){
                        for(j = 0; j < c; j++)
                                System.out.print(C[i][j]+" ");
                        System.out.println();
                }

        }
        public static void main(String[] args){
                input();
                System.out.print("1.Add 2.Subtract: ");
                if(sc.nextInt() == 2)negate();
                add();
                output();
        }
}