Given an NxN matrix and an integer X. The task is to remove X rows and X columns from the NxN matrix.
- Remove the first X rows and columns from the matrix.
Examples:
Input: n = 4,
arr[][] = {{20, 2, 10, 16},
{20, 17, 11, 6},
{14, 16, 1, 3},
{10, 2, 17, 4}},
x = 2
Output:
1 3
17 4
Explanation:
Here the value of X is 2.
So remove the first 2 rows
and the first 2 columns from the matrix.
Hence the output is
1 3
17 4
Simple Approach:
- Skip the first x rows and columns and print the remaining elements in the matrix.
- Start from the xth row and print till the n-1th row.
- Start from the xth column and print till the n-1th column.
Implementation:
C++
// C++ implementation of the above approach#include <iostream>using namespace std;// Function to remove first x// rows and columns from an arrayvoid remove_X_Rows_and_Columns(int* a, int n, int x){ cout << "\nRemoving First " << x << " rows and columns:\n"; // Start from the xth row // and print till n-1th row for (int i = x; i < n; i++) { // Start from the xth column // and print till the n-1th column for (int j = x; j < n; j++) { // Accessing the array using pointers cout << *((a + i * n) + j) << " "; } cout << endl; }}// Print the matrixvoid printMatrix(int* a, int n){ for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { cout << *((a + i * n) + j) << " "; } cout << endl; }}int main(){ int n = 4; // get the array inputs int a[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix cout << "Original Matrix:\n"; printMatrix((int*)a, n); int x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns((int*)a, n, x); return 0;} |
Java
// Java implementation of the above approachclass GFG{ // Function to remove first x// rows and columns from an arraystatic void remove_X_Rows_and_Columns(int a[][], int n, int x){ System.out.print("\nRemoving First " + x + " rows and columns:\n"); // Start from the xth row // and print till n-1th row for(int i = x; i < n; i++) { // Start from the xth column // and print till the n-1th column for(int j = x; j < n; j++) { // Accessing the array using pointers System.out.print(a[i][j] + " "); } System.out.println(); }}// Print the matrixstatic void printMatrix(int a[][], int n){ for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { System.out.print(a[ i][j] + " "); } System.out.println(); }}// Driver Codepublic static void main(String [] args){ int n = 4; // Get the array inputs int a[][] = new int[n][n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix System.out.println( "Original Matrix:"); printMatrix(a, n); int x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);}}// This code is contributed by chitranayal |
Python3
# Python3 implementation of the above approach # Function to remove first x# rows and columns from an arraydef remove_X_Rows_and_Columns(a, n, x): print("Removing First ", x, " rows and columns:") # Start from the xth row # and print till n-1th row for i in range(x, n): # Start from the xth column # and print till the n-1th column for j in range(x, n): # Accessing the array using pointers print(a[i][j], end = " ") print() # Print the matrixdef printMatrix(a, n): for i in range(n): for j in range(n): print(a[i][j], end = " ") print() # Driver Codeif __name__ == '__main__': n = 4 # get the array inputs a = [[0 for i in range(n)] for i in range(n)] for i in range(n): for j in range(n): a[i][j] = (i * 10 + j) # Print the matrix print("Original Matrix:") printMatrix(a, n) x = 2 # passing the two dimensional # array using a single pointer remove_X_Rows_and_Columns(a, n, x)# This code is contributed by# Mohit kumar 29 |
C#
// C# implementation of the above approachusing System;class GFG{ // Function to remove first x// rows and columns from an arraystatic void remove_X_Rows_and_Columns(int[,] a, int n, int x){ Console.WriteLine("\nRemoving First " + x + " rows and columns:\n"); // Start from the xth row // and print till n-1th row for(int i = x; i < n; i++) { // Start from the xth column // and print till the n-1th column for(int j = x; j < n; j++) { // Accessing the array using pointers Console.Write(a[i, j] + " "); } Console.WriteLine(); }}// Print the matrixstatic void printMatrix(int[,] a, int n){ for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { Console.Write(a[i, j] + " "); } Console.WriteLine(); }}// Driver Codestatic public void Main(){ int n = 4; // Get the array inputs int[,] a = new int[n, n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { a[i,j] = (i * 10 + j); } } // Print the matrix Console.WriteLine( "Original Matrix:"); printMatrix(a, n); int x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);}}// This code is contributed by avanitrachhadiya2155 |
PHP
<?php// PHP implementation of the above approach// Function to remove first x // rows and columns from an array function remove_X_Rows_and_Columns($a, $n, $x) { echo "\nRemoving First ", $x, " rows and columns:\n"; // Start from the xth row // and print till n-1th row for ($i = $x; $i < $n; $i++) { // Start from the xth column // and print till the n-1th column for ($j = $x; $j < $n; $j++) { // Accessing the array using pointers echo $a[$i][$j], " "; } echo "\n"; } } // Print the matrix function printMatrix($a, $n) { for ($i = 0; $i < $n; $i++) { for ($j = 0; $j < $n; $j++) { echo $a[$i][$j], " "; } echo "\n"; } } $n = 4; // get the array inputs $a = array(array());for ($i = 0; $i < $n; $i++) { for ($j = 0; $j < $n; $j++) { $a[$i][$j] = $i * 10 + $j; } } // Print the matrix echo "Original Matrix:\n"; printMatrix($a, $n); $x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns($a, $n, $x); // This code is contributed by Ryuga?> |
Javascript
<script> // javascript implementation of the above approach // Function to remove first x // rows and columns from an array function remove_X_Rows_and_Columns(a , n , x) { document.write("<br/>Removing First " + x + " rows and columns:<br/>"); // Start from the xth row // and print till n-1th row for (i = x; i < n; i++) { // Start from the xth column // and print till the n-1th column for (j = x; j < n; j++) { // Accessing the array using pointers document.write(a[i][j] + " "); } document.write("<br/>"); } } // Print the matrix function printMatrix(a , n) { for (i = 0; i < n; i++) { for (j = 0; j < n; j++) { document.write(a[i][j] + " "); } document.write("<br/>"); } } // Driver Code var n = 4; // Get the array inputs var a = Array(n); for (i = 0; i < n; i++) { a[i] = Array(n).fill(0); for (j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix document.write("Original Matrix:"); printMatrix(a, n); var x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);// This code contributed by gauravrajput1</script> |
Output
Original Matrix: 0 1 2 3 10 11 12 13 20 21 22 23 30 31 32 33 Removing First 2 rows and columns: 22 23 32 33
- Remove the last X rows and columns from the matrix.
Examples:
Input: n = 4,
arr[][] = {{20, 2, 10, 16},
{20, 17, 11, 6},
{14, 16, 1, 3},
{10, 2, 17, 4}},
x = 2
Output:
20 2
20 17
Explanation:
Here the value of X is 2.
So remove the last 2 rows and
the last 2 columns from the matrix.
Hence the output is
20 2
20 17
Simple Approach
- Skip the last x rows and columns and print the remaining elements in the matrix.
- Start from the 0th row and print till the n-xth row.
- Start from the 0th column and print till the n-xth column.
Implementation:
C++
#include <iostream>using namespace std;// Function to remove last x rows// and columns from an arrayvoid remove_X_Rows_and_Columns(int* a, int n, int x){ cout << "\nRemoving Last " << x << " rows and columns:\n"; // Start from the 0th row // and print till n-xth row for (int i = 0; i < n - x; i++) { // Start from the 0th column // and print till the n-xth column for (int j = 0; j < n - x; j++) { // Accessing the array using pointers cout << *((a + i * n) + j) << " "; } cout << endl; }}// Print the matrixvoid printMatrix(int* a, int n){ for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { cout << *((a + i * n) + j) << " "; } cout << endl; }}int main(){ int n = 4; // get the array inputs int a[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix cout << "Original Matrix:\n"; printMatrix((int*)a, n); int x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns((int*)a, n, x); return 0;} |
Java
import java.io.*;class GFG{ public static void remove_X_Rows_and_Columns( int[][] a,int n, int x){ System.out.println("\nRemoving Last " + x + " rows and columns:\n"); // Start from the 0th row // and print till n-xth row for(int i = 0; i < n - x; i++) { // Start from the 0th column // and print till the n-xth column for(int j = 0; j < n - x; j++) { // Accessing the array using pointers System.out.print(a[i][j] + " "); } System.out.println(); } }// Print the matrixpublic static void printMatrix(int[][] a, int n){ for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { System.out.print(a[i][j] + " "); } System.out.println(); } }// Driver codepublic static void main(String[] args) { int n = 4; // Get the array inputs int[][] a = new int[n][n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix System.out.println("Original Matrix:"); printMatrix(a, n); int x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);}}// This code is contributed by patel2127 |
Python3
# Function to remove last x rows# and columns from an arraydef remove_X_Rows_and_Columns(a, n, x): print("\nRemoving Last", x, "rows and columns:") # Start from the 0th row # and print till n-xth row for i in range(n - x): # Start from the 0th column # and print till the n-xth column for j in range(n - x): # Accessing the array using pointers print(a[i][j], end = " ") print()# Print the matrixdef printMatrix(a, n): for i in range(n): for j in range(n): print(a[i][j], end = " ") print()n = 4# get the array inputsa = [[0 for i in range(n)] for j in range(n)]for i in range(n): for j in range(n): a[i][j] = (i * 10 + j)# Print the matrixprint("Original Matrix:")printMatrix(a, n)x = 2# passing the two dimensional# array using a single pointerremove_X_Rows_and_Columns(a, n, x)# This code is contributed by rag2127 |
C#
using System;public class GFG{ public static void remove_X_Rows_and_Columns( int[,] a,int n, int x){ Console.WriteLine("\nRemoving Last " + x + " rows and columns:\n"); // Start from the 0th row // and print till n-xth row for(int i = 0; i < n - x; i++) { // Start from the 0th column // and print till the n-xth column for(int j = 0; j < n - x; j++) { // Accessing the array using pointers Console.Write(a[i,j] + " "); } Console.WriteLine(); } } // Print the matrixpublic static void printMatrix(int[,] a, int n){ for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { Console.Write(a[i,j] + " "); } Console.WriteLine(); } } // Driver code static public void Main (){ int n = 4; // Get the array inputs int[,] a = new int[n,n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { a[i,j] = (i * 10 + j); } } // Print the matrix Console.WriteLine("Original Matrix:"); printMatrix(a, n); int x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x); }}// This code is contributed by ab2127. |
Javascript
<script>// Function to remove last x rows// and columns from an arrayfunction remove_X_Rows_and_Columns(a, n, x){ document.write("<br>Removing Last"+ x+ "rows and columns:<br>"); // Start from the 0th row // and print till n-xth row for (let i = 0; i < n - x; i++) { // Start from the 0th column // and print till the n-xth column for (let j = 0; j < n - x; j++) { // Accessing the array using pointers document.write(a[i][j]+" "); } document.write("<br>") }}// Print the matrixfunction printMatrix(a,n){ for (let i = 0; i < n; i++) { for (let j = 0; j < n; j++) { document.write(a[i][j]+" "); } document.write("<br>") }}let n = 4; // get the array inputs let a = new Array(n); for (let i = 0; i < n; i++) { a[i]=new Array(n); for (let j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix document.write("Original Matrix:<br>"); printMatrix(a, n); let x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);// This code is contributed by unknown2108</script> |
Output
Original Matrix: 0 1 2 3 10 11 12 13 20 21 22 23 30 31 32 33 Removing Last 2 rows and columns: 0 1 10 11
- Remove the first X rows and last X columns from the matrix.
Examples:
Input: n = 4,
arr[][] = {{20, 2, 10, 16},
{20, 17, 11, 6},
{14, 16, 1, 3},
{10, 2, 17, 4}},
x = 2
Output:
14 16
10 2
Explanation:
Here the value of X is 2.
So remove the first 2 rows
and the last 2 columns from the matrix.
Hence the output is
14 16
10 2
Simple Approach
- Skip the first x rows and last x columns and print the remaining elements in the matrix.
- Start from the xth row and print till the n-1th row.
- Start from the 0th column and print till the n-xth column.
Implementation:
C++
#include <iostream>using namespace std;// Function to remove first x rows// and last x columns from an arrayvoid remove_X_Rows_and_Columns(int* a, int n, int x){ cout << "\nRemoving First " << x << " rows and Last " << x << " columns:\n"; // Start from the xth row // and print till n-1th row for (int i = x; i < n; i++) { // Start from the 0th column // and print till the n-xth column for (int j = 0; j < n - x; j++) { // Accessing the array using pointers cout << *((a + i * n) + j) << " "; } cout << endl; }}// Print the matrixvoid printMatrix(int* a, int n){ for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { cout << *((a + i * n) + j) << " "; } cout << endl; }}int main(){ int n = 4; // get the array inputs int a[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix cout << "Original Matrix:\n"; printMatrix((int*)a, n); int x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns((int*)a, n, x); return 0;} |
Java
import java.util.*;class GFG{// Function to remove first x rows// and last x columns from an arraystatic void remove_X_Rows_and_Columns(int[][] a, int n, int x){ System.out.print("\nRemoving First " + x + " rows and Last " + x + " columns:\n"); // Start from the xth row // and print till n-1th row for(int i = x; i < n; i++) { // Start from the 0th column // and print till the n-xth column for(int j = 0; j < n - x; j++) { // Accessing the array using pointers System.out.print(a[i][j]+ " "); } System.out.println(); }}// Print the matrixstatic void printMatrix(int[][] a, int n){ for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { System.out.print(a[i][j] + " "); } System.out.println(); }}// Driver codepublic static void main(String[] args){ int n = 4; // Get the array inputs int [][]a = new int[n][n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix System.out.print("Original Matrix:\n"); printMatrix(a, n); int x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);}}// This code is contributed by 29AjayKumar |
Python3
# Function to remove first x rows# and last x columns from an arraydef remove_X_Rows_and_Columns(a, n, x): print("\nRemoving First " , x , " rows and Last " , x , " columns:"); # Start from the xth row # and print till n-1th row for i in range(x, n): # Start from the 0th column # and print till the n-xth column for j in range(n - x): # Accessing the array using pointers print(a[i][j], end = " "); print();# Print the matrixdef printMatrix(a, n): for i in range(n): for j in range(n): print(a[i][j], end=" "); print();# Driver codeif __name__ == '__main__': n = 4; # Get the array inputs a = [[0 for i in range(n)] for j in range(n)] for i in range(n): for j in range(n): a[i][j] = (i * 10 + j); # Print the matrix print("Original Matrix:"); printMatrix(a, n); x = 2; # Passing the two dimensional # array using a single pointer remove_X_Rows_and_Columns(a, n, x);# This code is contributed by shikhasingrajput |
C#
using System;public class GFG{// Function to remove first x rows// and last x columns from an arraystatic void remove_X_Rows_and_Columns(int[,] a, int n, int x){ Console.Write("\nRemoving First " + x + " rows and Last " + x + " columns:\n"); // Start from the xth row // and print till n-1th row for(int i = x; i < n; i++) { // Start from the 0th column // and print till the n-xth column for(int j = 0; j < n - x; j++) { // Accessing the array using pointers Console.Write(a[i,j]+ " "); } Console.WriteLine(); }}// Print the matrixstatic void printMatrix(int[,] a, int n){ for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { Console.Write(a[i,j] + " "); } Console.WriteLine(); }}// Driver codepublic static void Main(String[] args){ int n = 4; // Get the array inputs int [,]a = new int[n,n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { a[i,j] = (i * 10 + j); } } // Print the matrix Console.Write("Original Matrix:\n"); printMatrix(a, n); int x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);}}// This code is contributed by 29AjayKumar |
Javascript
<script>// Function to remove first x rows// and last x columns from an arrayfunction remove_X_Rows_and_Columns(a , n,x){ document.write("<br>Removing First " + x + " rows and Last " + x + " columns:<br>"); // Start from the xth row // and print till n-1th row for(var i = x; i < n; i++) { // Start from the 0th column // and print till the n-xth column for(var j = 0; j < n - x; j++) { // Accessing the array using pointers document.write(a[i][j]+ " "); } document.write('<br>'); }}// Print the matrixfunction printMatrix(a , n){ for(var i = 0; i < n; i++) { for(var j = 0; j < n; j++) { document.write(a[i][j] + " "); } document.write('<br>'); }}// Driver code var n = 4; // Get the array inputs var a = Array(n).fill(0).map(x => Array(n).fill(0)); for(var i = 0; i < n; i++) { for(var j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix document.write("Original Matrix:<br>"); printMatrix(a, n); var x = 2; // Passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);// This code is contributed by 29AjayKumar </script> |
Output
Original Matrix: 0 1 2 3 10 11 12 13 20 21 22 23 30 31 32 33 Removing First 2 rows and Last 2 columns: 20 21 30 31
- Remove the last X rows and first x columns from the matrix.
Examples:
Input: n = 4,
arr[][] = {{20, 2, 10, 16},
{20, 17, 11, 6},
{14, 16, 1, 3},
{10, 2, 17, 4}},
x = 2
Output:
10 16
11 6
Explanation:
Here the value of X is 2.
So remove the last 2 rows and
the first 2 columns from the matrix.
Hence the output is
10 16
11 6
Simple Approach
- Skip the last x rows and first x columns and print the remaining elements in the matrix.
- Start from the 0th row and print till the n-xth row.
- Start from the xth column and print till the n-1th column.
Implementation:
C++
#include <iostream>using namespace std;// Function to remove last x rows// and first x columns from an arrayvoid remove_X_Rows_and_Columns(int* a, int n, int x){ cout << "\nRemoving Last " << x << " rows and First " << x << " columns:\n"; // Start from the 0th row // and print till n-xth row for (int i = 0; i < n - x; i++) { // Start from the xth column and // print till the n-1th column for (int j = x; j < n; j++) { // Accessing the array using pointers cout << *((a + i * n) + j) << " "; } cout << endl; }}// Print the matrixvoid printMatrix(int* a, int n){ for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { cout << *((a + i * n) + j) << " "; } cout << endl; }}int main(){ int n = 4; // get the array inputs int a[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix cout << "Original Matrix:\n"; printMatrix((int*)a, n); int x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns((int*)a, n, x); return 0;} |
Java
import java.util.*;class GFG{ // Function to remove last x rows // and first x columns from an array static void remove_X_Rows_and_Columns(int[][] a, int n, int x) { System.out.print("\nRemoving Last " + x + " rows and First " + x + " columns:\n"); // Start from the 0th row // and print till n-xth row for (int i = 0; i < n - x; i++) { // Start from the xth column and // print till the n-1th column for (int j = x; j < n; j++) { // Accessing the array using pointers System.out.print(a[i][j]+ " "); } System.out.println(); } } // Print the matrix static void printMatrix(int[][] a, int n) { for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { System.out.print(a[i][j]+ " "); } System.out.println(); } } public static void main(String[] args) { int n = 4; // get the array inputs int [][]a= new int[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix System.out.print("Original Matrix:\n"); printMatrix(a, n); int x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x); }}// This code is contributed by 29AjayKumar |
Python3
# Function to remove last x rows# and first x columns from an arraydef remove_X_Rows_and_Columns(a, n, x): print("\nRemoving Last ", x , " rows and First ", x, " columns:") # Start from the 0th row # and print till n-xth row for i in range(n - x): # Start from the xth column and # print till the n-1th column for j in range(x, n): # Accessing the array using pointers print(a[i][j], end = " ") print()# Print the matrixdef printMatrix(a, n): for i in range(n): for j in range(n): print(a[i][j], end = " ") print()# Driver codeif __name__ == '__main__': n = 4 # Get the array inputs a = [[0 for i in range(n)] for i in range(n)] for i in range(n): for j in range(n): a[i][j] = (i * 10 + j) # Print the matrix print("Original Matrix:") printMatrix(a, n) x = 2 # Passing the two dimensional # array using a single pointer remove_X_Rows_and_Columns(a, n, x)# This code is contributed by mohit kumar 29 |
C#
using System;using System.Collections.Generic;public class GFG{ // Function to remove last x rows // and first x columns from an array static void remove_X_Rows_and_Columns(int[,] a, int n, int x) { Console.Write("\nRemoving Last " + x + " rows and First " + x + " columns:\n"); // Start from the 0th row // and print till n-xth row for (int i = 0; i < n - x; i++) { // Start from the xth column and // print till the n-1th column for (int j = x; j < n; j++) { // Accessing the array using pointers Console.Write(a[i,j]+ " "); } Console.WriteLine(); } } // Print the matrix static void printMatrix(int[,] a, int n) { for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { Console.Write(a[i,j]+ " "); } Console.WriteLine(); } } public static void Main(String[] args) { int n = 4; // get the array inputs int [,]a= new int[n,n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i,j] = (i * 10 + j); } } // Print the matrix Console.Write("Original Matrix:\n"); printMatrix(a, n); int x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x); }}// This code is contributed by shikhasingrajput |
Javascript
<script> // JavaScript implementation of above approach // Function to remove last x rows // and first x columns from an array function remove_X_Rows_and_Columns(a, n, x) { document.write("</br>" + "Removing Last " + x + " rows and First " + x + " columns:" + "</br>"); // Start from the 0th row // and print till n-xth row for (let i = 0; i < n - x; i++) { // Start from the xth column and // print till the n-1th column for (let j = x; j < n; j++) { // Accessing the array using pointers document.write(a[i][j] + " "); } document.write("</br>"); } } // Print the matrix function printMatrix(a, n) { for (let i = 0; i < n; i++) { for (let j = 0; j < n; j++) { document.write(a[i][j] + " "); } document.write("</br>"); } } let n = 4; // get the array inputs let a = new Array(n); for (let i = 0; i < n; i++) { a[i] = new Array(n); for (let j = 0; j < n; j++) { a[i][j] = (i * 10 + j); } } // Print the matrix document.write("Original Matrix:" + "</br>"); printMatrix(a, n); let x = 2; // passing the two dimensional // array using a single pointer remove_X_Rows_and_Columns(a, n, x);</script> |
Output
Original Matrix: 0 1 2 3 10 11 12 13 20 21 22 23 30 31 32 33 Removing Last 2 rows and First 2 columns: 2 3 12 13
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