Question

write a c++ program.

Define a class ‘Matrix’ which contain 2D int array ‘m’ of size 3x3 as private member.

       There should be two public methods within the class definition namely:

• void setMatrixValue(int i, int j); that should set m[i][j] with user defined values
• int getMatrixValue(int i, int j); that should return m[i][j]

Make a global function named ‘CrossProduct(Matrix m1, Matrix m2)’ that should compute the marix multiplication

Answer 1

Screenshot :-

Code:-

#include <iostream>

using namespace std;

class Matrix
{
int m[3][3];
public:
void setMatrixValue(int i, int j)
{
cout<<"\nEnter the value: ";
cin>>m[i][j];   
}
  
int getMatrixValue(int i, int j)
{
return m[i][j];
}
};

void CrossProduct(Matrix m1, Matrix m2)
{
  
int i,j,k;
  
int result[3][3];
  
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
result[i][j]=0;
}
  
}
  
for(i = 0; i < 3; i++)
{
for(j = 0; j < 3; j++)
{
for(k = 0; k < 3; k++)
{
result[i][j] += m1.getMatrixValue(i,k) * m2.getMatrixValue(k,j);
}
}
}
  
cout<<"\n";
cout<<"The Matrix multiplication is: \n";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
cout<<result[i][j]<<"\t";
cout<<"\n";
  
}
  
}   

int main()
{
int i,j;
Matrix m1,m2;
cout<<"Enter first matrix:";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
m1.setMatrixValue(i,j);
  
}
  
cout<<"\nEnter Second matrix:";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
m2.setMatrixValue(i,j);
  
}
  
  
CrossProduct(m1,m2);
return 0;
}