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CS202: Programming Systems

LAB 2: Friend Function, Function Overloading, and References

Instructor: Hunh Cng Php

Affiliation: IT Faculty, Danang University of Technology

1. Write and run the sample below2. /* Production of a Complex number and a Real number: m(a+jb)=ma + jmb3. Create a friend function of both classes (Real and Complex) to perform this operation4. */5. #include 6. #include 7. class Complex;8. class Real9. {10.private:11.float value;12.

public:13.Real(float v=0)

14.{15.value=v;16.}17.void display()18.{19.cout

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43.C.real=A.value*B.real;44.C.image=A.value*B.image;45.return C;46.}47.main()48.{49.Real A(6);50.Complex B(5, 4);51.A.display();52.cout

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friend class Complex;

};

class Complex

{

private:

float real, image;

public:

Complex(float a=0, float b=0){

real=a;

image=b;

}

void display()

{

cout

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3. Create a Vector class including following members

*code

#include

#include

class Vector

{

private:

int n; // number of elements

float *data; // values of vector elements

public:

Vector() //Constructor allows user to enter values from keyboard

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{

int i;

cout> n;

data = new float[n];

for (i = 1; i

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}

return cout

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void Vector::display()

{

cout

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*When there is no element.

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4. Create a Matrix class including following members:

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*source code

#include

#include

using namespace std;

class Matrix

{ private:

int n , m;float **data;

public:

Matrix() //Construcror allows user to enter values for a matrix from keyboard

{

int i, j;

cout > n;

cout > m;

data = new float*[n]; // create rows

for (i = 0; i < n; i++)

{

data[i] = new float[m]; // create columns

}

for (i = 0; i < n; i++)

{

for(j = 0; j

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data = new float*[n];

for(int i = 0;i

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if(A.n==B.n && A.m==B.m)

{

Matrix C(n,m);

for(int i=0;i

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}

bool Matrix::equal(Matrix B)

{

Matrix A = *this;

if( A.n==B.n && A.m==B.m)

{

for(int i=0;i

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for (int j = 0; j

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2. With the perfect conditions, the best result is showed:

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5. Create functions:

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#include

#include

class Matrix;

/////class Vector

class Vector

{

private:int n; // number of elements

float *data; // values of vector elements

public:

Vector() //Constructor allows user to enter values from keyboard

{

int i;

cout> n;

data = new float[n];for (i = 1; i

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friend class Matrix;

// void display(); //Show values of vector

void display_Vector()

{

cout

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~Matrix(){}

Matrix(int N, int M) //create M-by-N matrix of 0's

{

n = N;

m = M;

data = new float*[n];for (int i =0; i < n;i++)

{

data[i] = new float[m];

}

}

Matrix(float **a)

{

data = new float*[n];

for(int i = 0;i

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int tmp = i;

i = j;

j = tmp;

};

void swap(Vector &A, Vector &B)

{

if(A.n==B.n){

for(int i=0;i

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{

if(m == A.n)

{

Vector D;

for(int i=0;i

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int x = 7, y = 6;

swap(x,y);

getch();

}

I have some error which I havent fix yet, so I could not run this code.