Magic Number

Program for check whether a number is Magic or Not

A Magic number said to Magic on the behalf of following rule

• Sum of each digit (1729=1+7+2+9=19)
• Reverse obtain sum of digit i.e. (19=91)
• Find product of sum of digit and reverse sum of digit i.e. (19*91=1729)
• If result is equal to input number then it is Magic number

/* *****************************************

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     Magic Number Program

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     *****************************************/

#include<stdio.h>

#include<conio.h>

void main()

{

     int n1,n2,i,sd=0,sr=0,j;

     clrscr();

     printf("Enter Number>> ");

     scanf("%d",&n1);

     n2=n1;

     /* sum of each digit */

     while(n1>0)

     {

           sd=sd+n1%10;

           n1=n1/10;

     }

     /* Reverse sum of each digit */

     n1=sd;

     while(n1>0)

     {

           sr=sr*10+n1%10;

           n1=n1/10;

     }

     /* Product of sum of digit and reverse sum of digit */

     n1=sd*sr;

     if(n1==n2)

           printf("\n\tMagic Number");

     else

           printf("\n\tNot a Magic Number");

     getch();

}

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