Matrix.h #include #include using namespace std; #ifndef MATRIX_H #define MATRIX_H class Matrix { friend ostream& operator<<(ostream& out, const Matrix& srcMatrix); public: Matrix(); // initialize Matrix class object with rowN=1, colN=1, and zero value Matrix(const int rN,const int cN ); // initialize Matrix class object with row number rN, col number cN and zero values Matrix(const Matrix &srcMatrix ); // initialize Matrix class object with another Matrix class object Matrix(const int rN, const int cN, const float *srcPtr); // initialize Matrix class object with row number rN, col number cN and a pointer to an array const float * getData()const; // create a temp pointer and copy the array values which data pointer points, // then returns temp. int getRowN()const; // returns rowN int getColN()const; // returns colN void print()const; // prints the Matrix object in rowNxcolN form Matrix transpose(); // takes the transpose of the matrix Matrix operator+(const Matrix &rhsMatrix)const; //+ operator which allows m1+m2 and returns a temp Matrix object Matrix operator-(const Matrix &rhsMatrix)const; //- operator which allows m1-m2 and returns a temp Matrix object Matrix operator*(const Matrix &rhsMatrix)const; //* operator which allows product of m1*m2 //(element-wise) and returns a temp Matrix object float operator()(const int r,const int c)const; //() operator which allows returning m1(r,c), //m1(0,0) is on the first row, first col Matrix& operator=(const Matrix &rhsMatrix); //= operator which allows m1=m2 and returns this pointer of m1 Matrix& operator+=(const Matrix &rhsMatrix); //+= operator which allows m1+=m2 and returns this pointer of m1 Matrix& operator-=(const Matrix &rhsMatrix); //-= operator which allows m1-=m2 and returns this pointer of m1 Matrix& operator*=(const Matrix &rhsMatrix); //*= operator which allows m1*=m2 (element-wise) and returns this pointer of m1 int operator==(const Matrix &rhsMatrix)const; //== operator which returns 1 if (m1==m2) int operator!=(const Matrix &rhsMatrix)const; //== operator which returns 1 if (m1!=m2) private: //() operator which allows returning m1(r,c), //m1(0,0) is on the first row,first col int rowN, colN; float* data; // e.g: if pointer data points an array of [ 1, 2, 3, 4, 5, 6] and the rowN=3 and coln=2 // matrix is actually // 1 2 3 // 4 5 6 }; #endif testMatix.cpp #include "Matrix.h" #include #include using namespace std; int main() { float arr1[]={1,2,3,4,5, 11,12,13,14,15, 21,22,23,24,25}; float arr2[]={9,8,7,6,5, 19,18,17,16,15, 29,28,27,26,25}; Matrix m1(3,5); Matrix m2(m1); Matrix m3(3,5,arr1); Matrix m4(3,5,arr2); //------------------- cout<<"m1(3,5)"<
Matrix.h
#include <iostream>
#include <iomanip>
using namespace std;
#ifndef MATRIX_H
#define MATRIX_H
class Matrix
{
friend ostream& operator<<(ostream& out, const Matrix& srcMatrix);
public:
Matrix();
// initialize Matrix class object with rowN=1, colN=1, and zero value
Matrix(const int rN,const int cN );
// initialize Matrix class object with row number rN, col number cN and zero values
Matrix(const Matrix &srcMatrix );
// initialize Matrix class object with another Matrix class object
Matrix(const int rN, const int cN, const float *srcPtr);
// initialize Matrix class object with row number rN, col number cN and a pointer to an array
const float * getData()const;
// create a temp pointer and copy the array values which data pointer points,
// then returns temp.
int getRowN()const; // returns rowN
int getColN()const; // returns colN
void print()const; // prints the Matrix object in rowNxcolN form
Matrix transpose(); // takes the transpose of the matrix
Matrix operator+(const Matrix &rhsMatrix)const;
//+ operator which allows m1+m2 and returns a temp Matrix object
Matrix operator-(const Matrix &rhsMatrix)const;
//- operator which allows m1-m2 and returns a temp Matrix object
Matrix operator*(const Matrix &rhsMatrix)const;
//* operator which allows product of m1*m2
//(element-wise) and returns a temp Matrix object
float operator()(const int r,const int c)const;
//() operator which allows returning m1(r,c),
//m1(0,0) is on the first row, first col
Matrix& operator=(const Matrix &rhsMatrix);
//= operator which allows m1=m2 and returns this pointer of m1
Matrix& operator+=(const Matrix &rhsMatrix);
//+= operator which allows m1+=m2 and returns this pointer of m1
Matrix& operator-=(const Matrix &rhsMatrix);
//-= operator which allows m1-=m2 and returns this pointer of m1
Matrix& operator*=(const Matrix &rhsMatrix);
//*= operator which allows m1*=m2 (element-wise) and returns this pointer of m1
int operator==(const Matrix &rhsMatrix)const;
//== operator which returns 1 if (m1==m2)
int operator!=(const Matrix &rhsMatrix)const;
//== operator which returns 1 if (m1!=m2)
private:
//() operator which allows returning m1(r,c),
//m1(0,0) is on the first row,first col
int rowN, colN;
float* data;
// e.g: if pointer data points an array of [ 1, 2, 3, 4, 5, 6] and the rowN=3 and coln=2
// matrix is actually
// 1 2 3
// 4 5 6
};
#endif
testMatix.cpp
#include "Matrix.h"
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
float arr1[]={1,2,3,4,5, 11,12,13,14,15, 21,22,23,24,25};
float arr2[]={9,8,7,6,5, 19,18,17,16,15, 29,28,27,26,25};
Matrix m1(3,5);
Matrix m2(m1);
Matrix m3(3,5,arr1);
Matrix m4(3,5,arr2);
//-------------------
cout<<"m1(3,5)"<<endl;
m1.print();
cout<<"m2(m1)"<<endl;
m2.print();
cout<<"m3(3,5,arr1)"<<endl;
m3.print();
cout<<"m3.transpose()"<<endl;
m3.transpose().print();
cout<<"m4(3,5,arr2)"<<endl;
m4.print();
//------------------
cout<<"elements=m3.getData()"<<endl;
const float* const elements=m3.getData();
const int rN=m3.getRowN();
const int cN=m3.getColN();
for (int i=0; i<rN; i++)
{
for (int j=0; j<cN; j++)
cout<<setw(4)<<elements[i*cN+j];
cout<<"\n";
}
//-------------------
cout<<"m3+=m4"<<endl;
(m3+=m4).print();
cout<<"m3-=m4"<<endl;
(m3-=m4).print();
cout<<"m3+m4"<<endl;
(m3+m4).print();
cout<<"m3"<<endl;
m3.print();
cout<<"m3=m3+m4"<<endl;
(m3=m3+m4).print();
cout<<"m3"<<endl;
m3.print();
cout<<"m3(2,2)="<<m3(2,2)<<endl<<endl;
//---------------
(m1==m2)?cout<<"m1==m2\n"<<endl:cout<<"m1!=m2\n"<<endl;
(m3!=m4)?cout<<"m3!=m4\n"<<endl:cout<<"m3==m4\n"<<endl;
cout<<"(m4*m4)\n";
(m4*m4).print();
//---------------
//cout<<"(m4*m4)\n";
//cout << (m4*m4) << endl;
return 0;
}
![1. Using the header file Matrix.h and testMatrix.cpp (check the course webpage)
a) Type the implementation file Matrix.cpp, compile your files and get an application file.
Hint: the use of the float* data pointer for a matrix object can be understood with the help of the following empty
constructor function
2
Matrix::Matrix ()
// initialize Matrix class object with rowN=1, colN=1, and zero value
{
}
rowN=1;
colN=1;
data=new float [rowN*colN];
for (int i=0; i<rowN; i++)
for (int j = 0; j<colN; j++)
data[i*colN+j]=0;
If colN=3 and rowN
m (i, j) will be data[i*3+j]
m (0,0), data [0*3+0] m (0,1), data [0*3+1] m (0,2), data [0*3+2]
m (1,0), data [1*3+0] m (1,1), data [1*3+1] m (1,2), data [1*3+2]
m (2,0), data [2*3+0] m (2,1), data [2*3+1] m (2,2), data [2*3+2]
Compile your codes, run your application file, and save the screen image of the shell window.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F70e43fc0-c98a-445d-bb4d-ca94b1343065%2F9f1c7ce5-463c-43c1-97f8-8416bcc57bc1%2Fpbfqr7n_processed.png&w=3840&q=75)
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