C++ Program for Matrix addition

C++ program to add two matrices has been shown here. Two matrices $[A]_{m \times n}$ and $[B]_{p \times q}$ are considered for addition if the number of rows and columns are same in both of the matrices i.e. $m = p$ and $n = q$.

Algorithm, pseudocode and time complexity of the program have also been shown.

Page content(s):

1. Program & Output: Iterative approach

Additional content(s):

1. Algorithm

2. Pseudocode

3. Time Complexity

1. C++ Program for matrix addition

Code has been copied

/***************************************
        alphabetacoder.com
    C++ Program for Matrix Addition
***************************************/
#include <iostream>

using namespace std;

int main(){
	// declare variables
    int m,n,p,q,i,j;
    int A[10][10]={0},B[10][10]={0};
    
    //take input of the order of first matrix
    cout<<"Enter the number of row and column of first matrix=";
    cin>>m;
    cin>>n;
    
    //take input of the first matrix
    cout<<"Enter the first matrix of order "<<m<<" x "<<n<<" =\n";
    for(i=0;i<m;i++)
        for(j=0;j<n;j++)
            cin>>A[i][j];

     //take input of the order of second matrix
    cout<<"Enter the number of row and column of second matrix=";
    cin>>p;
    cin>>q;
    
    //take input of the second matrix
    cout<<"Enter the second matrix of order "<<p<<" x "<<q<<" =\n";
    for(i=0;i<p;i++)
        for(j=0;j<q;j++)
            cin>>B[i][j];
    
    // check if order of matrices are same
    // if not then addition of two matrices is not possible
    if(m!=p||n!=q)
        cout<<"\nMatrices are of different order,hence addition is not possible";
    else{
        //add each corresponding elements
        // and print the resultant matrix 
        cout<<"The resultant matrix after addition:\n";
        for(i=0;i<m;i++){
            for(j=0;j<n;j++)
                cout<<A[i][j]+B[i][j];
            cout<<"\n";
        }
    }
    return 0;
}

Output

Case 1:

Enter the number of row and column of first matrix=3 3

Enter the first matrix of order 3 x 3=

3 5 7

4 5 9

0 1 1

Enter the number of row and column of second matrix=2 3

Enter the second matrix of order 2 x 3=

9 4 5

3 7 8

1 2 3

The resultant matrix after addition:=

12 9 12

7 12 17

1 3 4

Case 2: