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  1. #include <stdio.h>
  2.  
  3. int main(void) 
  4. {
  5.  
  6. 	int number; /* the inputted number to process */
  7. 	int right_digit; /* right most digit of a number */
  8. 	int sum_of_digits; /* the sum of the digits */
  9.  
  10. 	/* initialize sum of digits to zero */
  11. 	sum_of_digits = 0;
  12.  
  13. 	/* prompt for number to process */
  14. 	printf("Enter your number: ");
  15. 	scanf("%d", &number);
  16. 	printf("\n");
  17.  
  18. 	/* loop to strip out each of the digits */
  19. 	while (number != 0)
  20. 	{
  21. 		right_digit = number % 10; /* get the right most digit */
  22. 		printf("right digit = %d", right_digit);
  23.  
  24. 		/* add right most digit to our running total */
  25. 		sum_of_digits += right_digit;
  26. 		number = number / 10; /* or number /* 10; */
  27. 		printf(", number = %d\n", number);
  28. 	}
  29.  
  30. 	/* output the sum of the digits */
  31. 	printf("\nSum_of_digits = %d\n", sum_of_digits);
  32.  
  33. 	return (0);
  34. }
Success #stdin #stdout 0s 5288KB
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stdin
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8947
stdout
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Enter your number: 
right digit = 7, number = 894
right digit = 4, number = 89
right digit = 9, number = 8
right digit = 8, number = 0

Sum_of_digits = 28
https://ideone.com/ilPc5o
language:
C (gcc 8.3)
created:
9 days ago
visibility:
public

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