Need help of C++ HW which relate to the matrix! For this homework exercise you w

Question

Need help of C++ HW which relate to the matrix!

For this homework exercise you will be exploring the implementation of matrix multiplication using C++ There are third party libraries that provide matrix multiplication, but for this homework you will be implementing your own class object and overloading some C+ operators to achieve matrix multiplication. 1. [10pts] Create a custom class called Matrix a. Private Members i. int rows; ii. int cols iii. double*data; b. Provide NO default constructor c. Constructor i. Matrix(int,int) takes rows and cols ii. Inside constructor allocate and initialize data d. Destructor iMatrix() ii. Inside destructor delete memory allocation of data completely 2. [10pts] Overload Copy constructor 3. [10pts] Overload a. For input, user inputs the values of the matrix in row then column format i. HINT: using a space you can separate column data and enter for row b. For output, use tab and return line to create a matrix-like output 4. [10pts] Overload the assignment operator

Explanation / Answer

Solution:

part1 to 5 is done, please repost others.

code:

#include <iostream>

using namespace std;

class Matrix //class matrix

{

private: //private variables

int row, col;

double *m[10];

public:

Matrix(int r , int c) //constructor for row col and matrix initialization

{

row=r;

col=c;

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

m[i]= new double[col];

}

/* Matrix(Matrix const &ma);*/

friend ostream & operator << (ostream &out, const Matrix &c); //output stream function

friend istream & operator >> (istream &in, Matrix &c); //input stream function

void operator=(Matrix &x); //operator overloding functions =

void operator+=(Matrix &x); //operator overloding functions +=

void operator-=(Matrix &x); //operator overloding functions -=

void operator--(); //operator overloding functions --

void operator++(); //operator overloding functions ++

};

void Matrix :: operator=(Matrix &x) //operator overloding functions = defination

{

for(int i=0;i<x.row;i++)

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

m[i][j]=x.m[i][j];

}

void Matrix :: operator++() //operator overloding functions ++ defination

{

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

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

m[i][j]++;

}

void Matrix :: operator--()//operator overloding functions -- defination

{

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

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

m[i][j]--;

}

void Matrix ::operator+=(Matrix &x) //operator overloding functions += defination

{

for(int i=0;i<x.row;i++)

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

m[i][j]+=x.m[i][j];

}

void Matrix ::operator-=(Matrix &x) //operator overloding functions -= defination

{

for(int i=0;i<x.row;i++)

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

m[i][j]-=x.m[i][j];

}

/*Matrix::Matrix(Matrix const &ma)

{

row=ma.row;

col=ma.col;

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

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

m[i][j]=ma.m[i][j];

} */

ostream & operator << (ostream &out, const Matrix &c) //operator overloding functions << defination

{

for(int i=0;i<c.row;i++)

{

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

{

out << c.m[i][j];

cout<<" ";

}

cout<<endl;

}

return out;

}

istream & operator >> (istream &in, Matrix &c)//operator overloding functions >> defination

{

cout << "Matrix elements";

for(int i=0;i<c.row;i++)

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

in >> c.m[i][j];

return in;

}

int main() //main program

{

Matrix A(3,3),B(A),C(A),D(A); //object declaration and call copy constructor

cin >> A; //take input through ifstream

cout << "Given Matrix is "<<endl;

cout << A; //display output through ofstream

B=A; //= operator over loading

C=A;

D=A;

cout<<"copy object is "<<endl;

cout<<B;

B+=A; //+= operator loading

cout<<"after apply += matrix is "<<endl;

cout<<B;

cout<<"After apply -= matrix is "<<endl;

C-=D; //-= operator loading

cout<<D;

++D; //++ operator loading

cout<<"after applying ++ operator"<<endl;

cout<<D;

--D; //-- operator loading

cout<<"after applying -- operator"<<endl;

cout<<D;

return 0;

}

part 7:

#include <iostream>
using namespace std;
/* You can use this function for operator overloading in your class
istream& operator>>(istream& in,const int data)
{
   in>>data;
   return in;
}
*/
int main() {
//   char errorString[]="Download failed...";
//   cerr << "Error message" <<errorString<< endl; // prints !!!Hello World!!!

   int m1,m2,n1,n2;//dimension of matrix A,B

   cout<<">>Enter dimension of first matrix"<<endl;
   cin>>m1>>n1;

   cout<<">>Enter dimension of second matrix"<<endl;
   cin>>m2>>n2;

   cout<<"Enter "<<m1<<"*"<<n1<<"matrix"<<endl;
   int A[m1][n1];
   int B[m2][n2];
   for(int i=0;i<m1;i++)
       for(int j=0;j<n1;j++)
           cin>>A[i][j];

   cout<<"Enter "<<m2<<"*"<<n2<<"matrix"<<endl;
   for(int i=0;i<m2;i++)
       for(int j=0;j<n2;j++)
           cin>>B[i][j];

   cout<<"Enter any choice below"<<endl; //you need to call a function for each choice
   cout<<">> 1 -Addition//+,+="<<endl
           <<">> 2 -Subtract//-,-="<<endl
           <<">> 3 -Multiply//* opt"<<endl
           <<">> 4 -Increment each cell"<<endl //Enter your respective input choice in particular function
           <<">> 5 -Show both MAtrix"<<endl
           <<">> 0 -Exit"<<endl;
   return 0;
}

I hope this helps if you find any problem. Please comment below. Don't forget to give a thumbs up if you liked it. :)

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