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Program to check if two given matrices are identical
  • Difficulty Level : Basic
  • Last Updated : 23 Apr, 2021

The below program checks if two square matrices of size 4*4 are identical or not. For any two matrices to be equal, a number of rows and columns in both the matrix should be equal and the corresponding elements should also be equal. 

C++




// C++ Program to check if two
// given matrices are identical
#include <bits/stdc++.h>
#define N 4
using namespace std;
 
// This function returns 1 if A[][] and B[][] are identical
// otherwise returns 0
int areSame(int A[][N], int B[][N])
{
    int i, j;
    for (i = 0; i < N; i++)
        for (j = 0; j < N; j++)
            if (A[i][j] != B[i][j])
                return 0;
    return 1;
}
 
int main()
{
    int A[N][N] = { {1, 1, 1, 1},
                    {2, 2, 2, 2},
                    {3, 3, 3, 3},
                    {4, 4, 4, 4}};
 
    int B[N][N] = { {1, 1, 1, 1},
                    {2, 2, 2, 2},
                    {3, 3, 3, 3},
                    {4, 4, 4, 4}};
 
    if (areSame(A, B))
        cout << "Matrices are identical";
    else
        cout << "Matrices are not identical";
    return 0;
}
//This code is contributed by Shivi_Aggarwal

C




// C Program to check if two
// given matrices are identical
#include <stdio.h>
#define N 4
 
// This function returns 1 if A[][] and B[][] are identical
// otherwise returns 0
int areSame(int A[][N], int B[][N])
{
    int i, j;
    for (i = 0; i < N; i++)
        for (j = 0; j < N; j++)
            if (A[i][j] != B[i][j])
                return 0;
    return 1;
}
 
int main()
{
    int A[N][N] = { {1, 1, 1, 1},
                    {2, 2, 2, 2},
                    {3, 3, 3, 3},
                    {4, 4, 4, 4}};
 
    int B[N][N] = { {1, 1, 1, 1},
                    {2, 2, 2, 2},
                    {3, 3, 3, 3},
                    {4, 4, 4, 4}};
 
    if (areSame(A, B))
        printf("Matrices are identical");
    else
        printf("Matrices are not identical");
    return 0;
}

Java




// Java Program to check if two
// given matrices are identical
 
class GFG
{
    static final int N = 4;
     
    // This function returns 1 if A[][]
    // and B[][] are identical
    // otherwise returns 0
    static int areSame(int A[][], int B[][])
    {
        int i, j;
        for (i = 0; i < N; i++)
            for (j = 0; j < N; j++)
                if (A[i][j] != B[i][j])
                    return 0;
            return 1;
    }
     
    // Driver code
    public static void main (String[] args)
    {
        int A[][] = { {1, 1, 1, 1},
                      {2, 2, 2, 2},
                      {3, 3, 3, 3},
                      {4, 4, 4, 4}};
     
        int B[][] = { {1, 1, 1, 1},
                      {2, 2, 2, 2},
                      {3, 3, 3, 3},
                      {4, 4, 4, 4}};
     
        if (areSame(A, B) == 1)
            System.out.print("Matrices are identical");
        else
            System.out.print("Matrices are not identical");
    }
}
 
// This code is contributed by Anant Agarwal.

Python3




# Python3 Program to check if two
# given matrices are identical
 
N = 4
  
# This function returns 1
# if A[][] and B[][] are identical
# otherwise returns 0
def areSame(A,B):
     
    for i in range(N):
        for j in range(N):
            if (A[i][j] != B[i][j]):
                return 0
    return 1
 
# driver code
A= [ [1, 1, 1, 1],
    [2, 2, 2, 2],
    [3, 3, 3, 3],
    [4, 4, 4, 4]]
  
B= [ [1, 1, 1, 1],
    [2, 2, 2, 2],
    [3, 3, 3, 3],
    [4, 4, 4, 4]]
                     
if (areSame(A, B)==1):
    print("Matrices are identical")
else:
    print("Matrices are not identical")
 
# This code is contributed
# by Anant Agarwal.

C#




// C# Program to check if two
// given matrices are identical
using System;
 
class GFG {
     
    static int N = 4;
     
    // This function returns 1 if A[][]
    // and B[][] are identical
    // otherwise returns 0
    static int areSame(int [,]A, int [,]B)
    {
        int i, j;
        for (i = 0; i < N; i++)
            for (j = 0; j < N; j++)
                if (A[i,j] != B[i,j])
                    return 0;
            return 1;
    }
     
    // Driver code
    public static void Main ()
    {
        int [,]A = { {1, 1, 1, 1},
                    {2, 2, 2, 2},
                    {3, 3, 3, 3},
                    {4, 4, 4, 4}};
     
        int [,]B = { {1, 1, 1, 1},
                    {2, 2, 2, 2},
                    {3, 3, 3, 3},
                    {4, 4, 4, 4}};
     
        if (areSame(A, B) == 1)
            Console.WriteLine("Matrices "
                      + "are identical"); 
        else
            Console.WriteLine("Matrices "
                  + "are not identical");
    }
}
 
// This code is contributed by anuj_67.

PHP




<?php
// PHP Program to check if two
// given matrices are identical
 
// function returns 1 if A[][]
// and B[][] are identical
// otherwise returns 0
function areSame($A, $B)
{
 
    for($i = 0; $i < 4; $i++)
        for ($j = 0; $j < 4; $j++)
            if ($A[$i][$j] != $B[$i][$j])
                return 0;
    return 1;
}
 
// Driver Code
$A = array(array(1, 1, 1, 1),
           array(2, 2, 2, 2),
           array(3, 3, 3, 3),
           array(4, 4, 4, 4));
 
$B = array(array(1, 1, 1, 1),
           array(2, 2, 2, 2),
           array(3, 3, 3, 3),
           array(4, 4, 4, 4));
 
    if (areSame($A, $B) == 1)
        echo "Matrices are identical";
    else
        echo "Matrices are not identical";
         
// This code is contributed by Anuj_67
?>

Javascript




<script>
 
// Javascript Program to check if two
// given matrices are identical
 
const N = 4;
 
// This function returns 1 if A[][]
// and B[][] are identical
// otherwise returns 0
function areSame(A, B)
{
    let i, j;
    for (i = 0; i < N; i++)
        for (j = 0; j < N; j++)
            if (A[i][j] != B[i][j])
                return 0;
    return 1;
}
 
 
    let A = [ [1, 1, 1, 1],
              [2, 2, 2, 2],
              [3, 3, 3, 3],
              [4, 4, 4, 4]];
 
    let B = [ [1, 1, 1, 1],
              [2, 2, 2, 2],
              [3, 3, 3, 3],
              [4, 4, 4, 4]];
 
    if (areSame(A, B))
        document.write("Matrices are identical");
    else
        document.write("Matrices are not identical");
 
</script>

Output: 

Matrices are identical

The program can be extended for rectangular matrices. The following post can be useful for extending this program. 
How to pass a 2D array as a parameter in C?
The time complexity of the above program is O(n2).

The auxiliary space of the above program is O(1).
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.




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