Answer to Question #215554 in C++ for Fuad Endris

Question

1.Write a C++ program that accepts two 4X4 matrices, and calculates:

A.Sum of the matrices

B.Product of the matrices

      Define your functions to do the tasks. 

Answer 1

#include <iostream>
using namespace std;
void multiplyMatrix(){
	int arr[10][10], brr[10][10], multip[10][10], x1, y1, x2, y2, i, j, k;


    cout << "Put number of rows and columns for the first matrix: ";
    cin >> x1 >> y1;
    cout << "Put the number rows and columns for the second matrix: ";
    cin >> x2 >> y2;


    
   
 
    cout << endl << "Enter items of the first matrix :" << endl;
    for(i = 0; i < x1; ++i)
        for(j = 0; j < y1; ++j)
        {
            cout << "Enter items a" << i + 1 << j + 1 << " : ";
            cin >> arr[i][j];
        }


    
    cout << endl << "Enter items of the second matrix :" << endl;
    for(i = 0; i < x2; ++i)
        for(j = 0; j < y2; ++j)
        {
            cout << "Enter item b" << i + 1 << j + 1 << " : ";
            cin >> brr[i][j];
        }


    
    for(i = 0; i < x1; ++i)
        for(j = 0; j < y2; ++j)
        {
           multip[i][j]=0;
        }


   
    for(i = 0; i < x1; ++i)
        for(j = 0; j < y2; ++j)
            for(k = 0; k < y1; ++k)
            {
                multip[i][j] += arr[i][k] * brr[k][j];
            }


    
    cout << endl << "Output Matrix: " << endl;
    for(i = 0; i < x1; ++i)
    for(j = 0; j < y2; ++j)
    {
        cout << " " << multip[i][j];
        if(j == y2-1)
            cout << endl;
    }




}
void addMatrix(){
	int x, m, arr[50][50], br[50][50], sumArr[50][50], a, j;


    cout << "Enter the rows number between 1 and 50): ";
    cin >> x;


    cout << "Enter the columns number between 1 and 50): ";
    cin >> m;


    cout << endl << "Enter items of the first matrix: " << endl;


   
    for(a = 0; a < x; ++a)
       for(j = 0; j < m; ++j)
       {
           cout << "Enter item a" << a + 1 << j + 1 << " : ";
           cin >> arr[a][j];
       }


   
    cout << endl << "Enter items of the second matrix: " << endl;
    for(a = 0; a < x; ++a)
       for(j = 0; j < m; ++j)
       {
           cout << "Enter item " << a + 1 << j + 1 << " : ";
           cin >> br[a][j];
       }


  
    for(a = 0; a < x; ++a)
        for(j = 0; j < m; ++j)
            sumArr[a][j] = arr[a][j] + br[a][j];


    cout << "\n"<< "Sum of these two matrices is: " << endl;
    for(a = 0; a < x; ++a)
        for(j = 0; j < m; ++j)
        {
            cout << sumArr[a][j] << "  ";
            if(j == m - 1)
                cout << endl;
        }


}


int main()
{
	multiplyMatrix();
    addMatrix();
    return 0;
}