SWITCH STATEMENT

SWITCH CASE:

SYNTAX:

switch(expression)

{

case 1: statement 1;

             break;

case 2: statement 2;

            break;

case 3: statement 3;

             break;

default : statement 4;

               break;

}

SAMPLE PROGRAM :

#include<iostream.h>

#include<conio.h>

void main()

{

int ch;

cout <<"\n ENTER THE NUMBERS BELOW FIVE ";

cin >> ch;

switch(ch)

{
case 1:cout <<"\n THE NO. IS ONE ";

           break;

case 2: cout <<"\n THE NO. IS TWO ";

            break;

case 3: cout <<"\n THE NO. IS THREE ";

            break;

case 4: cout <<"\n THE NO. IS FOUR ";

            break;

default : cout <<"\n ENTER THE CORRECT CHOICE ";

              break;

}

getch();

}

 

CONSTRUCTOR WITH ARGUMENTS

CONSTRUCTOR WITH ARGUMENTS:

#include<conio.h>

class add

{

int num1, num2, sum=0;

public()

{
add( int a, int b)       \\ CONSTRUCTOR WITH ARGUMENTS \\

{
   num1=a;

   num2=b;

}

void addition()

{

sum=num1+num2;

}

void display()

{

cout <<"\n NUM1= " <<num1;

cout <<"\n NUM2= " <<num2;

cout <<"\n SUM = " <<sum;

}

};

void main()

{
clrscr();

add a(50, 60) ;

a.addition();

a.display();

getch();

}

C++ statements with syntax

If statement : 

Syntax :   

if(test condition)

{

   statment1;

}

Example:

#include<iostream.h>

#include<conio.h>

#include<string.h>

void main()

{

int age;

cout <<"\n Enter the age";

cin >>age;

if (age>=18)

{

    cout <<"\n YOU CAN VOTE ";

}

getch();

}

Explanation : 

                 The control enters the if statement and the test condition will checked and if the condition is TRUE  then the output will be displayed . If the condition is FALSE then nothing will be displayed.

If......else Statement :

Syntax:

if(test condition) 

statement 1;

else 

statement 2;

Example :

#include<iostream.h>

#include<conio.h>

void main()

{

int n;

cout <<"\n Enter the number";

cin >>n;

if (n%2==0)

cout <<"\n You have entered EVEN no";

else

cout <<"\n You have entered ODD no ";

getch();

}

Explanation :

                 The control enters the main() function . After getting the input value the test condition will checked and if the test condition is TRUE then the statement 1 will be displayed,  otherwise statement 2 will be displayed .