C Program to Check a Number is Strange or Not

Program :-


#include <stdio.h>
#include <math.h>
main(){
    int temp, num , count = 0,sum = 0,rem;
    printf("enter the number : ");
    scanf("%d",&num);
    temp = num;
    while(num > 0){
        num = num / 10;
        count++ ;
    }
    for(num =  temp ; num > 0 ; num = num /10)
    {
        rem = num % 10;
        sum = sum + pow(r,count);
     }
     if ( sum == temp)
         printf("\n number is strange");
     else
         printf("\n number is not strange");
 }

Output:-

enter the number :
12
number is no strange

Algorithm to Check a Number is Strange or Not

Step 1 : Start

Step 2 : Read Number

Step 3 : Temp  = Number , Sum = 0 ,Power = 0

Step 4 : Compare Number with 0 , if  Number > 0 then go to Step 5
             else go to Step 7  
Step 5 : Power = Power + 1
Step 6 : Number = Number / 10 ,then  go to Step 4
Step 7 : Number = Temp
Step 8 : Compare Number with 0 , if  Number > 0 then go to Step 9
             else go to Step 12
Step 9 : Reminder = Number % 10
Step 10 : Sum = Sum + Reminder ^ Power
Step 11 : Number = Number / 10 ,then  go to Step 8
Step 12 : if Sum =  Temp then go to Step 13
             else go to Step 14
Step 13 : print "Number is Armstrong" ,go to Step 15
Step 14 : print "Number is not Armstrong" ,go to Step 15

Step 15 : Stop