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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int a[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
  5. 	printf ("base adress of a:    %x\n", a); 
  6. 	printf ("address of a+3:      %x\n", a+3); 
  7. 	printf ("a[2][1]:             %x\n", &a[2][1]); 
  8. 	int x=2,y=1;
  9. 	printf ("Jacques's formula:   %x OUCH!!!\n", (a + (sizeof(int) * 3) * x + sizeof(int) * y));
  10. 	printf ("corrected:           %x\n", ((char*)a + (sizeof(int) * 3) * x + sizeof(int) * y));
  11. 	return 0;
  12. }
  13.  
Success #stdin #stdout 0s 9432KB
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stdin
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Standard input is empty
stdout
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base adress of a:    93ac3590
address of a+3:      93ac35b4
a[2][1]:             93ac35ac
Jacques's formula:   93ac36e0 OUCH!!!
corrected:           93ac35ac
https://ideone.com/ZhpOWB
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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