﻿ C : Check two matrices are equal or not

# C Exercises: Accept two matrices and check whether they are equal

## C Array: Exercise-30 with Solution

Write a program in C to accept two matrices and check whether they are equal.

Visual Presentation:

Sample Solution:

C Code:

``````#include <stdio.h>
#include <stdlib.h>

int main() {
int arr1[50][50], brr1[50][50];
int i, j, r1, c1, r2, c2, flag = 1;

// Display the purpose of the program
printf("\n\nAccept two matrices and check whether they are equal :\n");
printf("-----------------------------------------------------------\n");

// Input Rows and Columns of the 1st matrix
printf("Input Rows and Columns of the 1st matrix :");
scanf("%d %d", &r1, &c1);

// Input Rows and Columns of the 2nd matrix
printf("Input Rows and Columns of the 2nd matrix :");
scanf("%d %d", &r2, &c2);

// Input elements into the first matrix
printf("Input elements in the first matrix :\n");
for(i = 0; i < r1; i++) {
for(j = 0; j < c1; j++) {
printf("element - [%d],[%d] : ", i, j);
scanf("%d", &arr1[i][j]);
}
}

// Input elements into the second matrix
printf("Input elements in the second matrix :\n");
for(i = 0; i < r2; i++) {
for(j = 0; j < c2; j++) {
printf("element - [%d],[%d] : ", i, j);
scanf("%d", &brr1[i][j]);
}
}

// Display the first matrix
printf("The first matrix is :\n");
for(i = 0; i < r1; i++) {
for(j = 0; j < c1; j++) {
printf("% 4d", arr1[i][j]);
}
printf("\n");
}

// Display the second matrix
printf("The second matrix is :\n");
for(i = 0; i < r2; i++) {
for(j = 0; j < c2; j++) {
printf("% 4d", brr1[i][j]);
}
printf("\n");
}

// Comparing two matrices for equality
if(r1 == r2 && c1 == c2) {
printf("The Matrices can be compared : \n");
for(i = 0; i < r1; i++) {
for(j = 0; j < c2; j++) {
if(arr1[i][j] != brr1[i][j]) {
flag = 0;
break;
}
}
}
} else {
printf("The Matrices Cannot be compared :\n");
exit(1);
}

// Display whether matrices are equal or not
if(flag == 1)
printf("Two matrices are equal.\n\n");
else
printf("But, two matrices are not equal.\n\n");

return 0;
}
```
```

Sample Output:

```Accept two matrices and check whether they are equal :
-----------------------------------------------------------
Input Rows and Columns of the 1st matrix :2 2
Input Rows and Columns of the 2nd matrix :2 2
Input elements in the first matrix :
element - [0],[0] : 1
element - [0],[1] : 2
element - [1],[0] : 3
element - [1],[1] : 4
Input elements in the second matrix :
element - [0],[0] : 1
element - [0],[1] : 2
element - [1],[0] : 3
element - [1],[1] : 4
The first matrix is :
1   2
3   4
The second matrix is :
1   2
3   4
The Matrices can be compared :
Two matrices are equal.
```

Flowchart:

C Programming Code Editor:

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