My code is working for the most part however I can get it to display multiplication of the matrices correctly. Please have a look.

Thanks!

#include

using namespace std;

//Declare class matrix

class matrix

{

public:

// Declare variables

int row, col, a[10][10];

public:

//Member functions

matrix() { }

matrix(int, int);

friend ostream& operator<<(ostream& os, const matrix& m);

void getmatrix();

matrix operator+ (const matrix& m);

matrix operator- (const matrix& m);

matrix operator* (const matrix& s);

};

//Function to get values of matrix

void matrix::getmatrix()

{

cout << "enter the elements of the matrix" << endl;

for (int i = 0; i < row; i++) {

for (int j = 0; j < col; j++) {

cin >> a[i][j];

}

}

}

//Constructor to get row and column size

matrix::matrix(int a, int b)

{

row = a;

col = b;

}

//function to perform multiplication of a matrix

matrix matrix::operator+(const matrix& m)

{

matrix c(row, col);

if ((row == m.row) && (col == m.col))

{

for (int i = 0; i < row; i++) {

for (int j = 0; j < col; j++) {

c.a[i][j] = a[i][j] + m.a[i][j];

cout << c.a[i][j] << endl;

}

}

}

else

{

cout << "order of two matrices should be same" << endl;

exit(0);

}

return c;

}

//function to perform subtraction of a matrix

matrix matrix::operator-(const matrix& m)

{

matrix c(row, col);

if ((row == m.row) && (col == m.col))

{

for (int i = 0; i < row; i++) {

for (int j = 0; j < col; j++) {

c.a[i][j] = a[i][j] - m.a[i][j];

}

}

}

else

{

cout << "order of two matices should be same" << endl;

exit(0);

}

return c;

}

//function to perform multiplication of a matrix

matrix matrix::operator*(const matrix& m)

{

matrix c(row, col);

if (col == m.row)

{

for (int i = 0; i < row; i++) {

for (int j = 0; j < col; j++)

{

for (int k = 0; k < m.col; k++) {

c.a[i][j] += a[i][k] * m.a[k][j];

}

}

}

}

else

{

cout << "multiplication not possible" << endl;

exit(0);

}

return c;

}

// Overload <<

ostream& operator<<(ostream& os, const matrix& m)

{

for (int r = 0; r < m.row; r++)

{

os << endl;

for (int c = 0; c < m.col; c++)

{

os << m.a[r][c];

os << " ";

}

}

return os;

}

int main()

{

int r, p, x, y, c;

// Get information from user

cout << "Please choose one of the following opertations to perform" << endl;

cout << "1 addition" << endl << "2 subtraction" << endl << "3 multiplication" << endl << "4 exit" << endl;

cout << "enter the choice" << endl;

cin >> c;

cout << "enter the number of rows and columns of matrix1" << endl;

cin >> r >> p;

cout << "enter the number of rows and columns of matrix2" << endl;

cin >> x >> y;

// Create matrix

matrix d(r, p);

matrix e(x, y);

matrix f(r, p);

matrix s(r, p);

matrix m(r, y);

switch (c)

{

case 1:

d.getmatrix();

e.getmatrix();

f = d + e;

cout << "first matrix: ";

cout << d << endl;;

cout << "second matrix: " << e << endl;;

cout << "resultant matrix" << f << endl;

break;

case 2:

d.getmatrix();

e.getmatrix();

s = d - e;

cout << "First matrix: " << d << endl;

cout << "Second matrix: " << e << endl;

cout << "resultant matrix: " << s << endl;

break;

case 3:

d.getmatrix();

e.getmatrix();

m = d * e;

cout << "First matrix: " << d << endl;

cout << "Second matrix: " << e << endl;

cout << "resultant matrix: " << m << endl;

break;

default:

cout << "Invalid Choice" << endl;

break;

}

system("pause");

return 0;

}