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C++ Program to Add Two Matrixes

by suresh

Write a C++ Program to add two Matrixes with an example. In this C++ matrix addition example, we used the C++ nested for loop to iterate addarr1 and addarr2 matrixes from 0 to rows and columns. Within the nested for loop, we performed addition on both the matrixes and assigned them to the addition matrix.

(addition[rows][columns] = addarr1[rows][columns] + addarr2[rows][columns];)

Finally, we used one more nested for loop to print the addition matrix items.

#include<iostream>
using namespace std;

int main()
{
	int i, j, rows, columns;
	
	cout << "\nPlease Enter the rows and Columns a Multi-Dimensional Array =  ";
	cin >> i >> j;
	
	int addarr1[i][j], addarr2[i][j], addition[i][j];
	
	cout << "\nPlease Enter the First Multi-Dimensional Array Items =  ";
	for(rows = 0; rows < i; rows++)	{
		for(columns = 0; columns < i; columns++) {
			cin >> addarr1[rows][columns];
		}		
	}	
	cout << "\nPlease Enter the Second Multi-Dimensional Array Items =  ";
	for(rows = 0; rows < i; rows++)	{
		for(columns = 0; columns < i; columns++) {
			cin >> addarr2[rows][columns];
		}		
	}
	for(rows = 0; rows < i; rows++)	{
		cout << "\n---The Addition Result of " << rows + 1 << " Row Iteration---\n";
		for(columns = 0; columns < j; columns++) {
			addition[rows][columns] = addarr1[rows][columns] + addarr2[rows][columns];
			
			cout << "\nThe Addition Result of " << columns + 1 << " Column Iteration = ";
			cout << addarr1[rows][columns] << " + " << addarr2[rows][columns] << " = " << addition[rows][columns] << "\n";
		}
	}
	cout << "\nThe Final Result after adding addarr1 & addarr2 \n ";
	for(rows = 0; rows < i; rows++)	{
		for(columns = 0; columns < j; columns++) {
			cout << addition[rows][columns] << "  ";
		}
		cout<<"\n";
	}

 	return 0;
}
C++ Program to Add Two Matrixes 1

C++ Program to Add Two Matrixes Example 2

In this C++ matrix addition example, we removed that extra for loop to display the items and placed a cout statement (cout << addition[rows][columns] << ” “;) after performing the addition.

#include<iostream>
using namespace std;

int main()
{
	int i, j, rows, columns;
	
	cout << "\nPlease Enter the rows and Columns a Multi-Dimensional Array =  ";
	cin >> i >> j;
	
	int addarr1[i][j], addarr2[i][j], addition[i][j];
	
	cout << "\nPlease Enter the First Multi-Dimensional Array Items =  ";
	for(rows = 0; rows < i; rows++)	{
		for(columns = 0; columns < i; columns++) {
			cin >> addarr1[rows][columns];
		}		
	}	
	cout << "\nPlease Enter the Second Multi-Dimensional Array Items =  ";
	for(rows = 0; rows < i; rows++)	{
		for(columns = 0; columns < i; columns++) {
			cin >> addarr2[rows][columns];
		}		
	}
	cout << "\nThe Final Result after adding addarr1 & addarr2\n";
	for(rows = 0; rows < i; rows++)	{
		for(columns = 0; columns < j; columns++) {
			addition[rows][columns] = addarr1[rows][columns] + addarr2[rows][columns];
			cout << addition[rows][columns] << " ";
		}
	}
 	return 0;
}
C++ Program to Add Two Matrixes 2

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