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  1. #include <stdio.h>
  2.  
  3. int divby3(int n) {
  4. 	char s[10];
  5. 	do {
  6.    	   sprintf(s, "%d", n);
  7.    	   n = 0;
  8.    	   int i = 0;
  9. 	   while(s[i]) 
  10. 	       n += s[i++] - 0x30;
  11.  
  12. 	}
  13. 	while (n >= 10);	
  14.  
  15. 	return (n==0) || (n==3) || (n==6) || (n==9);
  16. }
  17.  
  18. int divby5(int n) {
  19.    char s[10];
  20.    int len = sprintf(s, "%d", n);
  21.    n = s[len - 1] - 0x30;
  22.    return (n==0) || (n==5);
  23. }
  24.  
  25.  
  26. int main(void) {
  27. 	printf("%d", divby5(75));
  28. 	return 0;
  29. }
  30.  
Success #stdin #stdout 0s 4752KB
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1
https://ideone.com/j65cMv
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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