Program to print the n terms of fibonacci series.

#include<stdio.h>

#include<conio.h>

void main()

{

                int a,b,c,i,n;

                a=0;

                b=1;

                clrscr();

                printf("\n Enter the number of terms");

                scanf("%d", &n);

                if(n == 1)

                          printf("\n  %d  ",a);

                else if(n>=2)

                {

                                  printf("\n  %d  \t  %d ",a,b);

                                  for(i=3;i<=n;i++)

                                  {

                                                    c=a+b;

                                                    printf("\t  %d",c);

                                                    a=b;

                                                    b=c;

                                   }

                 }

             

                 getch();

 }

Program to find whether a number is palindrome or not.

#include<stdio.h>

#include<conio.h>

void main()

{

                long rev = 0,n, num , rem;

                clrscr();

                printf("\n Enter the number");

                scanf("%ld",&num);

                n=num;

                while(n>0)

                {

                              rem= n % 10;

                              n=n/10; 

                              rev=rev*10 + rem;

                }

                

                if(rev = = num)

                             printf(" \n Number %ld is palindrome", num);

                else

                             printf(" \n Number %ld is not palindrome", num);                    

                getch();

}               

Program to reverse a number.

#include<stdio.h>

#include<conio.h>

void main()

{

                long rev = 0, rem , n;

                clrscr();

                printf("\n Enter the number ");

                scanf("%ld",&n);

                while(n>0)

                {

                                 rem=n%10;

                                 n=n/10;  

                                 rev=rev*10 +rem;

                }

                printf("\n The reverse number = %ld",rev);

 }

Program to calculate the average of given n number.

#include<stdio.h>

#include<conio.h>

void main()

{

               int i,n,sum=0,x;

               float avg;

               printf("\n How many numbers ");

               scanf(" %d ",&n);

               for(i=1;i<=n;i++)

               {

                               printf("\n Eneter %d number ",i);

                               scanf("%d",&x);

                               sum = sum + x;

                }

               

                avg=sum/n;

                printf("\n The average of numbers = %f",avg);

                getch();

}