Programs For Placements

// Factorial using Recursion

#include<stdio.h>

#include<conio.h>

long int fact(long int);

void main()

{

 long int n,res;

 clrscr();

 printf("\n Enter the n value:");

 scanf("%ld",&n);

 res=fact(n);

 printf("\n The Result is %ld",res);

 getch();

}

long int fact(long int n)

{

 long int f=1,res;

 if(n==0 || n==1)

          return 1;

 else

         res=n*fact(n-1);

   return res;

}

// Factorial without Recursion

#include<stdio.h>

#include<conio.h>

void main()

{

 int n,fact=1,i;

 clrscr();

 printf("\n Enter the n value:");

 scanf("%d",&n);

 if(n==1 || n==0)

 {

  n=1;

  printf("\n The result is : %d",n);

 }

 for(i=1;i<=n;i++)

                fact=fact*i;

 printf("The Result is =%d",fact);

getch();

}

// Program for Fibonacci series for a=0 and b=1 fixed values

#include<stdio.h>

#include<conio.h>

void main()

{

 int a=0,b=1,c,n,i;

 clrscr();

 printf("\n Enter the range of the series:");

 scanf("%d",&n);

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

 for(i=2;i<n;i++)

 {

  c=a+b;

  a=b;

  b=c;

  printf("\t %d \t",c);

 }

 getch();

}

// Program for Fibonacci Series asking a and b values from user

#include<stdio.h>

#include<conio.h>

void main()

{

 int a,b,c,n,i;

 clrscr();

 read:printf("\n Enter the values of a and b:");

 scanf("%d %d",&a,&b);

 if(a==0 && b==0)

 goto read;

 printf("\n Enter the range:");

 scanf("%d",&n);

 printf("The Series is %d\t%d",a,b);

 for(i=2;i<n;i++)

 {

  c=a+b;

  a=b;

  b=c;

  printf("\t%d",c);

 }

getch();

}

// Prime numbers from 2 to N

#include<stdio.h>

#include<conio.h>

void main()

{

 int n,i,j,flag=0;

 clrscr();

 printf("\n Enter the range:");

 scanf("%d",&n);

 for(i=2;i<=n;i++)

 {

  for(j=2;j<=i;j++)

  {

   if(i%j==0)

    flag++;

  }

  if(flag==1)

  printf("\n The Prime nubers are : %d",i);

  flag=0;

 }

 getch();

}

// List of Prime Numbers Between Two Integer values.

#include<stdio.h>

#include<conio.h>

void main()

{

 int m,n,i,j,flag=0;

 clrscr();

 read: printf("\n Enter the range between M and N:");

 scanf("%d %d",&m,&n);

 if(m>n)

 goto read;

 for(i=m;i<=n;i++)

 {

  for(j=2;j<=i;j++)

  {

   if(i%j==0)

    flag++;

  }

  if(flag==1)

  printf("\n The Prime nubers are : %d",i);

  flag=0;

 }

 getch();

}

//Sum of the individual digits. [Eg: 145 – 1+4+5=10]

#include<stdio.h>

#include<conio.h>

void main()

{

 int n,rem,i,sum=0;

 clrscr();

 printf("\n Enter the digit:");

 scanf("%d",&n);

 while(n!=0)

 {

  rem=n%10;

  n=n/10;

  sum=sum+rem;

  }

 printf("The Result is %d",sum);

 getch();

}

// swapping of 2 numbers with temporary (Call by Reference)

#include<stdio.h>

#include<conio.h>

void swap(int *,int *);

void main()

{

 int a,b,c;

 clrscr();

 printf("\n Enter the values of a and b:");

 scanf("%d %d",&a,&b);

 printf("\n \n Before swapping the values are %d \t %d \n",a,b);

 swap(&a,&b);

 printf("\n The After swapping the values are %d \t %d \n",a,b);

 getch();

}

void swap(int *x,int *y)

{

 int t;

 t=*x;

 *x=*y;

 *y=t;

}

//Swapping without temporary variable

#include<stdio.h>

#include<conio.h>

void main()

{

 int a,b;

 clrscr();

 printf("\n Enter the values of a and b:");

 scanf("%d %d",&a,&b);

 printf("\n Before swapping %d and %d\n",a,b);

 a=a+b;

 b=a-b;

 a=a-b;

 printf("\n After swapping %d and %d",a,b);

 getch();

}

// Reversing a Digit Eg: if a = 321 the result should be 123

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
 int num,i,count=0,res,sum=0,mo;
 clrscr();
 printf("\n Enter the number:");
 scanf("%d",&num);
 res=num;
 while(num!=0)
 {
 num=num/10;
 count++;
 }
  for(i=count-1;res!=0;i--)
  {
  mo=res%10;
  sum = sum+(mo*pow(10,i));
  res=res/10;
  }
  printf("Final Result = %d \n \t",sum);
  getch();
 }

// Reversing the digit in another way but it is not the correct one so max avoid this program

#include<stdio.h>
#include<conio.h>
void main()
{
 int a,b;
 printf("Enter the number to be reversed:");
 scanf("%d",&a);
 if(a<0)
  a=-a;
 printf("Reverse number is");
 do
 {
  b=a%10;
  printf("%d\n \t",b);
  a=a/10;
  } while(a>0);
  getch();
 }

More Programs Yet to Come