inlab(3)2013

#include<stdio.h>



    int main(){


            int num,sum=0,r;

            do{
            printf("Enter a 5-digit positive number: ");
            scanf("%d",&num);


            if (num<0)
            {
                    printf ("Sorry,this is not a 5-digit positive number/n");
            }

            else
            {
                    if (num>= 10000 && num < 100000)
                    {
                            for(;num!=0;num=num/10)
                            {
                            r=num%10;
                            sum=sum+r;
                            }

                    printf("Sum of digits of number:  %d\n",sum);
                    break;
                    }

                    else
                    {
                            printf ("Sorry,this is not a 5-digit positive number/n");
                    }

            }

            }while(1);
      return 0;
    }