operation's number(sum,reverse,store in other variable)

Q. Write a program to insert a number and do following tasks:

 a.Display in reverse order?

 b.Reverse in another variable and display it?

 c.Display sum of its all digit?

Ans.

#include<stdio.h>

#include<conio.h>

void main()

{

 int x,num,rem,sum=0,var=0;

 clrscr();

 printf("\nPress Number 1 for reverse number");

 printf("\nPress Number 2 for reverse number in another variable");

 printf("\nPress Number 3 for sum of entered number");

 scanf("%d",&x);

 switch(x)

 {

 case 1 :

  printf("\nEnter Number : ");

  scanf("%d",&num);

  while(num>=1)

  {

   rem=num%10;

   printf("Reverse number : %d",rem);

   num=num/10;

  }

  break;

 case 2 :

  printf("Enter Number : ");

  scanf("%d",&num);

  while(n>=1)

  {

   rem=n%10;

   var=var*10+rem;

   n=n/10;

  }

  printf("%d",var);

  break;

 case 3 :

  printf("\nEnter Number : ");

  scanf("%d",&num);

  while(num>=1)

  {

   rem=num%10;

   sum=sum+rem;

   num=num/10;

  }

  printf("Sum of %d is %d",num,sum);

  break;

 default :

   printf("You enter wrong number!!!");

   break;

 }

}

       Output of above program : 

Press Number 1 for reverse number

Press Number 2 for reverse number in another variable

Press Number 3 for sum of entered number

1

Enter Number : 4812

Reverse number : 2184