PROGRAMS OF C++

• PROGRAM TO FIND THE SIZE OF DATA TYPES.
• PROGRAM BASED ON INCREMENT / DECREMENT OPERATORS.
• PROGRAM BASED ON SWAPPING.
• WRITE A PROGRAM TO FIND THE SUM OF TWO NUMBERS.
• WRITE A PROGRAM TO REVERSE A NUMBER WITHOUT USING ANY CASE .
• WRITE A PROGRAM TO MULTIPLY 2 FLOATING NUMBERS.
• WRITE A PROGRAM TO PRINT "HELLO WORLD" IN DOUBLE QUOTES.
• WRITE A PROGRAM TO FIND SMALLEST NUMBER WITHOUT USING ANY CASE.
• WRITE A PROGRAM TO FIND THE FACTORIAL OF A NUMBER.
• PROGRAM TO FIND THE PERIMETER AND AREA OF RECTANGLE.
• WRITE A PROGRAM TO FIND THE MULTIPLICATION TABLE OF ANY NUMBER.
• WRITE A PROGRAM TO DISPLAY THE FOLLOWING OUTPUT USING A SINGLE COUT STATEMENT.                                                                                                                       subject              marks                                                                                                                        mathematics=       86                                                                                                                          physics        =        96                                                                                                                         chemistry   =         98
• WRITE A PROGRAM WHICH ACCEPT TEMPERATURE IN FAHRENHEIT AND PRINT IN CENTIGRADES. 
• WRITE A PROGRAM TO FIND THE SIMPLE INTEREST.
• WRITE A PROGRAM WHICH ACCEPTS A CHARACTER AND PRINTS ITS ASCII VALUE.
• WRITE A PROGRAM TO CHECK WHEATHER THE GIVEN NUMBER IS POSITIVE OR NEGATIVE.

   

* WRITE A PROGRAM TO FIND THE SIZE OF DATA TYPES.

#include<iostream.h>

#include<conio.h>

    void main()

{

 int a;

 float b;

 char c; 

 double d;

 short e;

    cout<<"size of integer is %d= " <<sizeof(a);    //we use %d for integer

    cout<<"size of float is %f ="<<sizeof(b);         //we use %f for float 

    cout<<"size of character is %c = "<<sizeof(c); //we use %c for character

    cout<<"size of double is %f "<<sizeof(d);      //we use %f for double

    cout<<"size of short is %d="<<sizeof(e);        //we use %d for short

getch();

}
SAMPLE OUTPUT
SIZE OF INTEGER IS =2
SIZE OF FLOAT IS =4
SIZE OF CHARACTER IS=1
SIZE OF DOUBLE IS =8
SIZE OF SHORT IS =2

========================================================================

*WRITE  PROGRAMS TO SHOW INCREMENT OF A NUMBER .

CASE 1:

#include<iostream.h>

#include<conio.h>

void main();

{

   int i,j;

   i=5;

   j=++i;

   cout<<j;

   cout<<"\n"<<i;

getch();

}

CASE 2:

   #include<iostream.h>

   #include<conio.h>

    void main( )

{

   int i,j;

   i=5;

   j=i++;

  cout<<"\n"<<j;

  cout<<"\n"<<i;

getch();

} 

CASE 3:

#include<iostream.h.

#include<conio.h>

   void main ()

{

  int i;

  i=5;

  i= ++i + ++i + i++;

  cout<<"\n"<<i;

getch();

}

CASE 4:

#include<iostream.h>

#include<conio.h>

 void main()

{

 int i;

 i=5;

 j=++i + i++ + ++i + i++;

 cout<<"\n"<<j;

 getch();

}

CASE 5:

#include<iostream.h>

#include<conio.h>

void main ()

{

 int i,j;

 i=2;

 j=5;

 i=j++ + --i + j-- + --i + i-- + j--;

 cout<<"\n"<<i;

 getch( );

}
========================================================================

*WRITE A PROGRAM TO SHOW SWAPPING OF NUMBERS.

  CASE 1:

#include<iostream.h>

#include<conio.h.

   void main ()

{

 int a,r;

 a=52;

 r=a/10;                   // value of a is divided by 10 

 cout<<"\n"<<r;

getch( )

}

CASE 2:

#include<iostream.h>

#include<conio.h>

 void main ()

{

  int n,s,r;                  //initialization

  n=123;

  s=0;

r=n%10

  n=n/10;                  //value of n is divided by 10

  s=s+r;       

  r=n%10;                // % symbol is called modulus it gives the remainder 

  s=s+r;

  n=n/10;

  s=s+n;

  cout<<"\n"<<s;   //this line represent the output  

getch();                 //getch means get the character which holds the screen and show the output

}
========================================================================

* WRITE A PROGRAM TO FIND THE SUM OF TWO NUMBERS .

#include<iostream.h>

#include<conio.h>

  void main ()

{

 int a, b, sum=0;     //initialization of variables

 cout<<"enter the value of a ";    //print statement 

 cin>>a;                                       //output statement 

 cout<<"enter the value of b ";

 cin>>b;

 sum=a+b;                                   //sum statement

 cout<<"\n sum is "<<sum;         //this line shows the sum of two numbers

getch();

}

=======================================================================

* WRITE A PROGRAM TO REVERSE NUMBER WITHOUT USING ANY CASE.

 #include<iostream.h>

# include<conio.h>

 void main ()

{

int n=521,s=0,r;
r=n%10;

  n=n/10;                  

  s=s*10+r 

  r=n%10;                

  s=s*10+r

  n=n/10   

  s=s*10+n;
getch();
}

SAMPLE OUTPUT
125
========================================================================

* WRITE A PROGRAM TO MULTIPLY TWO FLOATING NUMBERS

#include<iostream.h>
#include<conio.h.
 void main ()
{
double a,b,mul;
cout<<"\nenter the first number %f";
cin>>a;
cout<<"\n enter the second number%f";
cin>>b;
mul=a*b;
cout<<mul;
getch();
}

======================================================================= *WRITE A PROGRAM TO PRINT "HELLO WORLD IN DOUBLE QUOTES.

#include<iostream.h>
#include<conio.h>
void main ()
{
cout<<"\"hello world\"";
getch();
}

SAMPLE OUTPUT

"HELLO WORLD"
=======================================================================
*WRITE A PROGRAM TO FIND SMALLEST NUMBER WITHOUT USING ANY CASE.

#include<iostream.h>
#include<conio.h>

int compare(int a,int b)
{
return(a+4<b)? a:b;
}

  int main ()
{
  cout<<"\nsmallest number is :"<<compare(11,12);
  cout<<"\n"smallest number is :"<<compare(55,88);
  cout<<"\n"smallest number is :"<<compare(100,89);

getch();
return0;
}

SAMPLE OUTPUT

SMALLEST NUMBER IS 11
SMALLEST NUMBER IS 55
SMALLEST NUMBER IS 89
======================================================================= *WRITE A PROGRAM TO FIND THE FACTORIAL OF A NUMBER .

#include<iostream.h>
#include<conio.h>
int factorial(int var)
{
int fact=1;
for(int i=1;i<=var;i++)
fact=fact*i;
return fact;
}

  int main()
{
 cout<<"\nfactorial of a number is :"<<factorail(7);
 getch();
 return 0;
}

SAMPLE OUTPUT

FACTORIAL IS 5040.
 =======================================================================
* WRITE A PROGRAM TO FIND THE PERIMETER AND AREA OF A RECTANGLE.

#include<iostream.h>
#include<conio.h>

void main ()
{

clrscr();
int length,width ,perimeter ,area;        //Declaration
cout<<"length=\n";                             //prompt user
cin>>length;
cout<<"width=\n" ;
cin>>width;

perimeter=2*(length+width);            //formula to find the perimeter
area=length*width;                            //formula to find the area

cout<<endl;
       <<"perimeter is "<<perimeter;
cout<<endl;
       <<"area is "<<area;
        <<endl;
getch();
}
========================================================================
*WRITE A PROGRAM TO FIND THE MULTIPLICATION TABLE OF  A NUMBER.

#include<iostream.h>
#include<conio.h>
void main()
{
int n;
cout<<"enter the number";
cin>>n;
for(int  i=1;i<=10;i++)
{
cout<<n<<" * "<<i<<"="<<n*i<<endl;
}
getch();
}
========================================================================
*  WRITE A PROGRAM TO DISPLAY THE FOLLOWING OUTPUT USING A SINGLE COUT STATEMENT.                                                                                                                                   subject              marks                                                                                                                               mathematics       86                                                                                                                                    physics                96                                                                                                                                   chemistry            98

#include<iostream.h>

#include<conio.h>

void main ()

{

clrscr();

cout<<"subject"<<"\marks"<<"mathematics\n"<<86<<"physics\n"<<96<<"chemistry\n"<<98;

getch();

}

SAMPLE OUTPUT
SUBJECT                MARKS
MATHEMATICS     86
PHYSICS                  96 
CHEMISTRY             98

========================================================================

*WRITE A PROGRAM WHICH ACCEPT TEMPERATURE IN FAHRENHEIT AND PRINT IN CENTIGRADES.

#include<iostream.h>

#include<conio.h>

void main()

{

int f,c;

cout<<"enter the temperature in fahrenheit";

cin>>f;

c=5*(f-39)/9;                    //formula which is converting the temperature 

cout<<"temperature in celcius is ";

cin>>c;

getch();

}

========================================================================

*WRITE A PROGRAM TO FIND THE SIMPLE INTEREST.

#include<iostream.h>

#include<conio.h>

void main ()

{

int p,r,t,s;

cout<<"enter the principal ";      // user input

cin>>p;                                        //the values

cout<<"enter the rate ";

cin>>r;

cout<<"enter the time";

cin>>t;

s=(p*r*t)/100;       //formula to find the simple interest

cout<<"simple interest is "<<s;

getch();

}

========================================================================

*WRITE A PROGRAM WHICH ACCEPTS A CHARACTER AND PRINTS ITS ASCII VALUE

#include<iostream.h>

#include<conio.h>

int main ()                 //int means it returns a value otherwise it shows an error.

{

char ch;

cout<<"enter any character ";

cin>>ch;

cout<<"its ASCII value is" <<(int)ch;        

return 0;

getch();

}

========================================================================

*WRITE A PROGRAM TO CHECK WHEATHER THE GIVEN NUMBER IS POSITIVE OR NEGATIVE.

#include<iostream.h>

#include<conio.h>

void main()

{

int n;

cout<<"enter the number ";

cin>>a;

(a>0)?cout<<"the number is positive ":cout<<"the number is negative";  //using ternary operator

getch();

}

========================================================================