c Practical Programs

8/13/2019 c Practical Programs

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FRIEND FUNCTION:

#include

#include

class ONE;

class TWO

{

public:

void print(ONE&x);

};

class ONE

{

int a,b;

friend void TWO::print(ONE&x);

public:

ONE():a(1),b(2)

{

}

};

void TWO::print(ONE&x)

{

cout


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}

int main()

{

clrscr();

ONE xobj;

TWO yobj;

yobj.print(xobj);

return 0;

getch();

}


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long sum;

sum=x+y;

return sum;

}

float add(float x,float y)

{

float sum;

sum=x+y;

return sum;

getch();

}


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OUTPUT:

Enter two integers

4

9

sum of integers:13

Enter two floating point numbers

4.5

8.2

sum of floats:12.7


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ERROR HANDLING DURING FIVE OPERATIONS:

#include

#include

int main()

{

double Operand1, Operand2, Result;

char Operator;

clrscr();

cout > Operand1 >> Operator >> Operand2;

switch(Operator)

{

case '+':

Result = Operand1 + Operand2;

break;

case '-':

Result = Operand1 - Operand2;

break;

case '*':

Result = Operand1 * Operand2;

break;

case '/':


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FORMS OF INHERITANCE:

#include

#include

class Cpolygon

{

protected:

int width, height;

public:

void input_values (int one, int two)

{

width=one;

height=two;

}

};

class Crectangle: public Cpolygon

{

public:

int area ()

{

return (width * height);

}


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};

class Ctriangle: public Cpolygon

{

public:

int area ()

{

return (width * height / 2);

}

};

int main ()

{

Crectangle rectangle;

Ctriangle triangle;

rectangle.input_values (2,2);

triangle.input_values (2,2);

clrscr();

cout


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OUTPUT:

area of rectangle:4

area of triangle:2


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INLINE FUNCTION:

#include

#include

inline float triangle_area(float base,float height)

{

float area;

area=(0.5*base*height);

return area;

}

int main(void)

{

float b,h,a;

b=4;

h=6;

a=triangle_area(b,h);

clrscr();

cout


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OUTPUT:

Area=(0.5*base*height)

Where,base=4,height=6

Area=12


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MANIPULATORS:

#include

#include

#include

#include

void main ( )

{

float x = 23.012345678;

float y = 44;

float z = 3.765;

float a = 4.5;

clrscr();

cout


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OUTPUT:

2345.012346

0.005544

23.012346

44

3.765

4.5

23.012346443.7654.5


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MULTI-DIMENSIONAL ARRAYS:

#include

#include

#include

int main()

{

const int Rows=4;

const int Columns=4;

int matrix[Rows][Columns];

int copyarray;

const int End_of_row=4;

const int End_of_col=4;

int r;

int c;

clrscr();

cout


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cin>>matrix[r][c];

for(r=0;r


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SPECIAL OPERATORS:

#include

#include

class distance

{

int feet;

float inches;

public:

distance()

{

feet=0;

inches=0.0;

}

distance(int ft,float in)

{

feet=ft;

inches=in;

}

void getdist()

{

coutfeet;


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coutinches;

}

void showdist()

{

cout


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clrscr();

distance dist1,dist2(11,6.25),dist3,dist4;

dist1.getdist();

dist3=dist1+dist2;

dist4=dist1+dist2+dist3;

cout


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OUTPUT:

Enter feet:7

Enter inches:13.5

dist1=7'-13.5"

dist2=11'-6.25"

dist3=19'-7.75"

dist4=39'-3.5"


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STREAM CLASSES:

#include

#include

#include

class numbers

{

public:

numbers(char[]="unknown",int=0,float=0.0);

void display();

void update();

private:

char name[30];

int a;

float b;

};

numbers::numbers(char nm[],int j,float k)

{

strcpy(name,nm);

a=j;

b=k;

}

void numbers::update()


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{

coutb;

}

void numbers::display()

{

cout


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OUTPUT:

The name is unknown

The number are 0 and 0

The name is John

The number are 12345 and 678.900024


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PURE VIRTUAL FUNCTION:

#include

#include

class Base

{

public:

void Nonvirtual()

{

cout


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voidvirtual()

{

cout Nonvirtual();

bBase->voidvirtual();

bDerived->Nonvirtual();

bDerived->voidvirtual();

getch();

}


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OUTPUT:

Base Nonvirtual called.

Base virtual called.

Base Nonvirtual called.

Derived virtual called.


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COMMAND LINE ARGUMENTS TO PRINT THE GIVENNUMBER IN DESCENDING AND ASCENDING ORDER:

#include

#include

const int MAXSIZE = 10;

void selectionSort(int arr[], int size);

void swap(int& x, int& y);

int main()

{

int numbers[] = { 13, 5, 1, 7, 9, 11, 3, 17, 19, 15 };

int k;

cout


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}

void selectionSort(int arr[], int size)

{

int indexOfMin, pass, j;

for (pass = 0; pass < size - 1; pass++)

{

indexOfMin = pass;

for (j = pass + 1; j < size; j++)

if (arr[j] < arr[indexOfMin])

indexOfMin = j;

swap(arr[pass], arr[indexOfMin]);

}

}

void swap(int& x, int& y)

{

int temp;

temp = x;

x = y;

y = temp;

}


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OUTPUT:

BEFORE SORT: 13 5 1 7 9 11 3 17 19 15

AFTER SORT: 1 3 5 7 9 11 13 15 17 19


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CLASSES AND OBJECTS:

#include

#include

class Box

{

public:

double length;

double breath;

double height;

};

int main()

{

clrscr();

Box Box1;

Box Box2;

double volume=0.0;

Box1.height=5.0;

Box1.length=6.0;

Box1.breath=7.0;

Box2.height=10.0;

Box2.length=12.0;

Box2.breath=13.0;


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volume=Box1.height*Box1.length*Box1.breath;

cout


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OUTPUT:

Volume of Box1:210

Volume of Box2:1560


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return 0;

}


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OUTPUT:

x=20


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if(a>b)

cout


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USER DEFINE FUNCTION TO COMPARE TWOSTRINGS:

#include

#include

#include

class kan

{

public:

char str[30],str1[30];

void oper1()

{

coutstr;

coutstr1;

}

void oper2()

{

if(strcmp(str,str1)==0)

{

cout


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else

{

cout


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OUTPUT:

Enter the FIRST string : C++

Enter the SECOND string : C++

Given string both are equal

Enter the FIRST string : C++

Enter the SECOND string : C

Given string both are not equal


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NESTED CLASS:

#include

class mail_info

{

int shipper;

int postage;

public:

void set(int input_class, int input_postage)

{

shipper = input_class;

postage = input_postage;

}

int get_postage(void){ return postage;}

};

class box

{

int length;

int width;

mail_info label;

public:

void set(int l, int w, int ship, int post)

{


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length = l;

width = w;

label.set(ship, post);

}

int get_area(void) { return (length * width);}

};

void main(void)

{

box small, medium, large;

small.set(2,4,1,35);

medium.set(5,6,2,72);

large.set(8,10,4,98);

cout


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OUTPUT:

Area of small box's label is 8

Area of medium box's label is 30

Area of large box's label is 80


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ABSTRACT CLASS:

#include

#include

class A

{

public:

virtual void action() = 0;

};

class B : public A

{

public:

B() {}

void action()

{

cout


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{

cout


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B Binst;

C Cinst;

A.setinst(&Binst);

A.dosomething();

A.setinst(&Cinst);

A.dosomething();

return 0;

getch();

}


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OUTPUT:

Hello world!

Good bye world!


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UNARY AND BINARY OPERATORS:

#include

#include

class Minus

{

private:

int a, b, c ;

public:

Minus(int A, int B, int C)

{

a = A;

b = B;

c = C;

}

void display(void);

void operator - ( );

};

void Minus :: display(void)

{

cout


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}inline void Minus :: operator - ( )

{

a = -a ;

b = -b ;

c = -c ;

}

int main(void)

{

Minus M(5, 10, -15) ;

Clrscr();

cout


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OUTPUT:

Before activating operator - ( )

a= 5

b= 10

c= -15

After activating operator - ( )

a= -5

b= -10

c= 15


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RELATIONAL, LOGICAL AND BITWISE OPERATORS:

#include

#include

int main()

{

unsigned short flags1;

unsigned short flags2;

flags1 = 0x00FF;

flags2 = 0xFF00;

clrscr();

cout


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OUTPUT:

Bitwise Operator: 0

Logical Operator: 1

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