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  1.  
  2. #include<stdio.h>
  3. int main()
  4. {
  5. int n,sum=0,m;
  6. printf("Enter a number:");
  7. scanf("%d",&n);
  8. while(n>0)
  9. {
  10. m=n%10;
  11. sum=sum+m;
  12. n=n/10;
  13. }
  14. printf("Sum is=%d",sum);
  15. return 0;
  16. }
Success #stdin #stdout 0.01s 5304KB
stdin
Standard input is empty
stdout
Enter a number:Sum is=23