(20)Write a Program to display prime no between 1 to N number in CPP

#include<iostream.h> #include<conio.h> class primen {  int a,n,no,c,m;  public:   void insert();   void display();   };   void primen::insert()   {    cout<<"\n\t\tEnter Number:";    cin>>m;   }   void primen::display()   {   a=1;    while(a<=m)    {     c=0;     no=a;     n=1;     while(n<=no)     {      if(no%n==0)      {        c=c++;       }       n++;     }     if(c==2)     {      cout<<a;     }     a++;     } } void main() {  clrscr();  primen pp;  pp.insert();  pp.display();  getch();  }

(19) Wap to display Armstrong No between 1 To N Number in Cpp

#include<iostream.h> #include<conio.h> class armstrongn {        long int m;        int a,n,r,c,no;        public:               void getdata();               void putdata(); }; void armstrongn :: getdata() {        cout<<"\n\t\t Enter Number : ";        cin>>m; } void armstrongn :: putdata() {        a=1;        while(a<=m)        {               no=a;               c=no;               r=0;               while(no>=1)               {                      n=no%10;                      r=r+(n*n*n);                      no=no/10;               }               if(c==r)                      cout<<r<<"  ";               a++;        } } void main() {        clrscr();        armstrongn r1;        r1.getdata();        r1.putdata();        getch(); }

v  Output

Enter Number : 1000 1 153 370 371 407

(18)Write a programm to display palindrom No between 1 To N Number in CPP

v  Program

#include<iostream.h> #include<conio.h> class palindromn {        int a,n,m,r,c,no;        public:               void getdata();               void putdata(); }; void palindromn :: getdata() {        cout<<"\n\t\t Enter Number : ";        cin>>m; } void palindromn :: putdata() {        a=1;        while(a<=m)        {               no=a;               c=no;               r=0;               while(no>=1)               {                      n=no%10;                      r=(r*10)+n;                      no=no/10;               }               if(c==r)                      cout<<r<<"  ";               a++;        } } void main() {        clrscr();        palindromn r1;        r1.getdata();        r1.putdata();        getch(); }

v  Output

Enter Number : 30 1 2 3 4 5 6 7 8 9 11 22

 (17)Write a program to enter any number and check it is armstrong No or not in Cpp

vProgram

#include<iostream.h> #include<conio.h> class armstrong {   int n,no,r,c;   public:     palindrom()     { r=0;     }     void getdata()     {      cout<<"\n\t\t Enter Number:";     cin>>no;     }     void putdata()     {        c=no;       for( ;no>=1; )       {        n=no%10;        r=r+(n*n*n);        no=no/10;       }       if(c==r)       {       cout<<"\n\t\t A Number Is Armstrong !!";       }       else       {        cout<<"\n\t\t A Number Not Armstrong !!";       }      }   };   void main()   {    clrscr();    armstrong p1;    p1.getdata();    p1.putdata();    getch();  }

vOutput:

Enter Number:153 A Number Is Armstrong !!

(16)write a program to enter any no and check it is prime No Or Not. in Cpp(Using Class)

vProgram

#include<iostream.h> #include<conio.h> class primeno {   int n,no,c;   public:     primeno()     { c=0;     n=1;     }     void input()     {      cout<<"\n\t\t Enter Number:";     cin>>no;     }     void output()     {       while(n<=no)       {        if(no%n==0)        {          c++;        }        n++;       }       if(c==2)       {       cout<<"\n\t\t A Prime  Number ";       }       else       {        cout<<"\n\t\t A  Not Prime number!!";       }      }   };   void main()   {    clrscr();    primeno p1;    p1.input();    p1.output();    getch();  }

vOutput

Enter Number:151  A prime Number

(15)Write a Program to enter any no and check it is palidrom no or Not.in Cpp(using Class)

vProgram

#include<iostream.h> #include<conio.h> class palindrom {   int n,no,r,c;   public:     palindrom()     { r=0;     }     void getdata()     {      cout<<"\n\t\t Enter Number:";     cin>>no;     }     void putdata()     {        c=no;       while(no>=1)       {        n=no%10;        r=(r*10)+n;        no=no/10;       }       if(c==r)       {       cout<<"\n\t\t A Palindrom Number Is:"<<r;       }       else       {        cout<<"\n\t\t A Number Not Palindrom !!";       }      }   };   void main()   {    clrscr();    palindrom r1;    r1.getdata();    r1.putdata();    getch();  }

vOutput

Enter Number:343 A Palindrom number Is:343

(14)Write a program to enter any No. and display reverse No. in CPP (Using Class)

vProgram

#include<iostream.h> #include<conio.h> class reverse {   int n,no,r;   public:     reverse()     { r=0;     }     void getdata()     {      cout<<"\n\t\t Enter Number:";     cin>>no;     }     void putdata()     {       while(no>=1)       {        n=no%10;        r=(r*10)+n;        no=no/10;       }       cout<<"\n\t\t A reverse Number Is:"<<r;      }   };   void main()   {    clrscr();    reverse r1;    r1.getdata();    r1.putdata();    getch();  }

vOutput

Enter Number:123 A reverse Number Is:321