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Fibonacci Series

#include<iostream.h>
#include<conio.h>
void main()
{
  int a=0,b=1,c=0,n;
  clrscr();
  cout<<"Enter the limit:";
  cin>>n;
  cout<<a<<"\n"<<b<<;
  while(c<=n)
  {
    c=a+b;
    if(c>n);
      break;
    a=b;
    b=c;
  }
  getch();
}

Factorial Using Recursion

#include<iostream.h>
#include<conio.h>
void main()
{
  int n,fact;
  int rec(int); clrscr();
  cout<<"Enter the number:";
  cin>>n;
  fact=rec(n);
  cout<<endl<<"Factorial Result are<<fact<<"\n";
  getch();
}
rec(int x)
{
 int f;
 if(x==1)
  return(x);
 else
 {
  f=x*rec(x-1);
  return(f);
 }
}

To find Prime or not

#include<iostream.h>
#include<conio.h>
void main()
{
 int n,a=0;
 clrscr();
 cout<<"Enter the no:";
 cin>>n;
 for(int i=1;i<=n;i++)
 {
  if(n%i==0)
   {
     a++;
   }
 }
 if(a==2)
  cout<<"It's a prime number";
 else
  cout<<"It's not a prime no";
 getch();
}

To print even numbers for a limit

To print even numbers for a limit

#include<iostream.h>
#include<conio.h>
void main()
{
 int n;
 clrscr();
 cout<<"Enter your limit:";
 cin>>n;
 for(int=2;i<=n;i++)
 {
  if(i%2==0)
       cout<<i<<"\n";
 }
getch();
}

To print odd numbers for a limit

#include<iostream.h>
#include<conio.h>
void main()
{
 int n;
 clrscr();
 cout<<"Enter your limit:";
 cin>>n;
 for(int=1;i<=n;i++)
 {
  if(i%2==1)
       cout<<i<<"\n";
 }
getch();
}

To find largest in two/three no.s

To find largest in two no.s

#include <iostream.h>
#include <conio.h>
void main ()
{
int a,b;
clrscr ();
cout <<"Enter A: ";
cin >>a;
cout <<"Enter B: ";
cin >>b;
if (a>b)
{
cout <<"A is Greater";
}
else
{
cout <<"B is Greater";
}
getch ();
}

To find largest in three no.s

#include <iostream.h>
#include <conio.h>
void main ()
{

 int a,b,c;
 cout<<"Enter three no.s:";
 cin>>a>>b>>c;
 if(a>b)
 {
  if(a>c)
   cout<<a<<"is greater";
  else
   cout<<c<<"is greater";
 }
 else
 {
  if(b>c)
   cout<<b<<"is greater";
  else
   cout<<c<<"is greater";
 }
getch();
}

To print 1 to 10 (using for loop)(c++)

To print 1 to 10

#include<iostream.h>
#include<conio.h>
void main()
{
 clrscr();
 for(int i=1;i<=10;i++)
 cout<<i<<endl;
 getch();
 return 0;
}

To print 1 to a limit

#include<iostream.h>
#include<conio.h>
void main()
{
 clrscr();
 int n,i;
 cout<<"Enter the limit:";
 cin>>n;
 for(i=1;i<=n;i++)
 cout<<i;
 getch();
}

Program for Summation,Subtraction,Multiplication,Average

#include<iostream.h>
#include<conio.h>
int main()
{
 clrscr();
 int a,b,sum,sub,mult,avg;
 cin>>a>>b;
 sum=a+b;
 sub=a-b;
 mult=a*b;
 avg=(a+b)/2;
 cout<<sum<<sub<<mult<<avg;
 getch();
}

Program to display ASCII code of a character and vise versa.

#include<iostream.h>
#include<conio.h>
int main()
{
 clrscr();
 char ch='A';
 int num=ch;
 cout<<"The ASCII code for "<<ch<<"is"<<num<<"\n";
 cout<<"Adding 1 to the character code: \n";
 ch=ch+1;
 num=ch;
 cout<<"The ASCII code for"<<ch<<"is"<<num<<"\n";
 return 0;
}

Output:-
The ASCII code for A is 65
Adding 1 to the character code :
The ASCII code for B is 66

A very simple program for printing a string.

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

Output:-

Welcome