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  1. #include <stdio.h>  /* printf() */
  2.  
  3.  
  4. void reverse( char str[] )
  5. {
  6. 	char * ptr = str;
  7.  
  8. 	while( ptr && *ptr )
  9. 		ptr++;
  10.  
  11. 	for( ptr--; str < ptr; str++, ptr-- )
  12. 	{
  13. 		*str = *str ^ *ptr;
  14. 		*ptr = *str ^ *ptr;
  15. 		*str = *str ^ *ptr;
  16. 	}
  17. }
  18.  
  19.  
  20. int main( void )
  21. {
  22. 	char txt[] = "O rato roeu a roupa do rei de Roma";
  23.  
  24. 	reverse( txt );
  25.  
  26. 	printf("%s\n", txt );
  27.  
  28. 	return 0;
  29. }
  30.  
  31. /* eof */
  32.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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amoR ed ier od apuor a ueor otar O
https://ideone.com/03NIC2
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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