Question

in c++

Develop a program (name it AddMatrices) that adds two user provided matrices. The matrices must of the same size. The program defines method Addition() that takes two two-dimensional arrays of integers and returns their addition as a two-dimensional array. The program main method defines two 3-by-3 arrays of type integer. The method prompts the user to initialize the arrays. Then it calls method Addition(). Finally, it prints out the array retuned by method Addition(). Document your code, and organize and space the outputs properly as shown below.

Sample run 1:

Matrix A:

2    1    2

7    1   8

3    20   3

Matrix B:

1    1    1

1    1    1

1    1    1

A + B:

3    2    3

8    2    9

4    21   4

Answer 1

Here you go. Explanation goes with code flow.

#include <iostream>
#include <bits/stdc++.h>

using namespace std;

int** Addition(int A[][3], int B[][3]){
  
// Declare c to add matrix A B
int** c = 0;
c = new int*[3];
  
for(int i=0;i<3;i++){
c[i] = new int[3];
for(int j=0;j<3;j++){
c[i][j] = A[i][j] + B[i][j];
}
}
  
// Return C
return c;
}

int main() {
  
// Initilize 2D array matriccies
int matrix1[3][3], matrix2[3][3];
  
// Take inputs
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
cout << "Enter value of matrix1[" << i << "][" << j << "]: ";
cin >> matrix1[i][j];
}
}
  
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
cout << "Enter value of matrix2[" << i << "][" << j << "]: ";
cin >> matrix2[i][j];
}
}
  
// Call the Adition function
int **result = Addition(matrix1, matrix2);
  
// Print the returned matrix
cout << "Final Matrix:"<<endl;
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
cout << result[i][j] << " ";
}
cout << endl;
}
  
   return 0;
}

O/P:

Enter value of matrix1[0][0]: 1
Enter value of matrix1[0][1]: 2
Enter value of matrix1[0][2]: 3
Enter value of matrix1[1][0]: 4
Enter value of matrix1[1][1]: 5
Enter value of matrix1[1][2]: 6
Enter value of matrix1[2][0]: 7
Enter value of matrix1[2][1]: 8
Enter value of matrix1[2][2]: 9
Enter value of matrix2[0][0]: 1
Enter value of matrix2[0][1]: 1
Enter value of matrix2[0][2]: 1
Enter value of matrix2[1][0]: 1
Enter value of matrix2[1][1]: 1
Enter value of matrix2[1][2]: 1
Enter value of matrix2[2][0]: 1
Enter value of matrix2[2][1]: 1
Enter value of matrix2[2][2]: 1
Final Matrix:
2 3 4
5 6 7
8 9 10

CODE:

#include <iostream> #include <bits/stdc++.h> 4 using namespace std; int** Addition(int A[][3], int B[][3]){ ovou // Declare c to add matrix AB int** c = 0; c = new int [3]; 10 11 12 13 14 15 for(int i=0;i<3;i++){ c[i] = new int[3]; for(int j=0; j<3;j++){ c[i][j] = A[i][j] + B[i][j]; 16 17 18 19 // Return C return c; 20 21 } 22 23 24 int main() { 25 // Initilize 2D array matriccies int matrix1[3][3], matrix2[3][3]; 26 27 28 $ 3; i++) { / ++){ ... of matra 29 30 // Take inputs for(int i=0;i<3;i++){ for(int j=0; j<3;j++){ cout << "Enter value of matrix1[" << i << "[" << j << "]: "; cin >> matrix1[i][j];

35 36 37 38 for(int i=0;i<3;i++){ for(int j=0; j<3;j++){ cout << "Enter value of matrix2[" << i << "[" « cin >> matrix2[i][j]; j << "]: "; 39 40 43 // call the Adition function int **result = Addition(matrix1, matrix2); 44 45 46 47 48 49 // Print the returned matrix cout << "Final Matrix:"<<endl; for(int i=0;i<3;i++){ for(int j=0;j<3; j++){ cout << result[i][j] << " "; 50 52 cout << endl; 55 return 0; 56 }

O/P:

Enter value of matrix1[0][0]: 1 Enter value of matrix1[0] [1]: 2, Enter value of matrix1[0] [2]: 3 Enter value of matrix1[1] [O]: 4 Enter value of matrix1[1] [1]: 5 Enter value of matrix1[1] [2]: 6 Enter value of matrix1[2] [O]: 7 Enter value of matrix1[2] [1]: 8 Enter value of matrix1[2] [2]: 9 Enter value of matrix2[0] [O]: 1 Enter value of matrix2[0] [1]: 1 Enter value of matrix2[0] [2] : 1 Enter value of matrix2[1] [O]: 1 Enter value of matrix2 [1] [1]: 1 Enter value of matrix2 [1] [2]: 1, Enter value of matrix2 [2] [O]: 1 Enter value of matrix2 [2] [1] : 1 Enter value of matrix2 [2] [2] : 1 Final Matrix: 2 3 4 5 6 7 8 9 10