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  1. #include <stdio.h>
  2.  
  3. void foo( unsigned char a, 
  4. 	  unsigned char b, 
  5. 	  unsigned char c, 
  6. 	  ...  )
  7. {
  8. 	unsigned char *d1 = &c - 1;
  9. 	unsigned char *d2 = &c - 1;
  10.  
  11.         printf( "a: %p\nb: %p\nc: %p\n", 
  12.                 (void *)&a, 
  13.                 (void *)&b, 
  14.                 (void *)&c );
  15.         printf( "d1: %hhu\n", 
  16. 		*d1 );
  17.         printf( "d2: %hhu\n", 
  18. 		*d2 );
  19. }
  20.  
  21.  
  22.  
  23. int main(void)
  24. {
  25.         foo( 1, 2, 3, 4 );
  26.  
  27.  
  28.         return 0;
  29. }
  30.  
Success #stdin #stdout 0.01s 1720KB
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stdin
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Standard input is empty
stdout
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a: 0xbfb02ec8
b: 0xbfb02ec4
c: 0xbfb02ec0
d1: 191
d2: 191
https://ideone.com/BtieW
language:
C99 (gcc 8.3)
created:
14 years ago
visibility:
public

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