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  1. #include <stdio.h>
  2.  
  3. void swap_pointer( int *pp[] );
  4.  
  5. int main(void) {
  6. 	int a=1;
  7. 	int b=2;
  8. 	int *p[] = {&a, &b};
  9. 	int n = sizeof(p)/sizeof(p[0]);
  10. 	int i;
  11.  
  12. 	for( i=0; i<n; i++ )
  13. 		printf( "before: p[%d] %p\n", i, p[i] );
  14. 	for( i=0; i<n; i++ )
  15. 		printf( "before: *p[%d] %d\n", i, *p[i] );
  16.  
  17. 	swap_pointer(p);
  18.  
  19. 	for( i=0; i<n; i++ )
  20. 		printf( "after: p[%d] %p\n", i, p[i] );
  21. 	for( i=0; i<n; i++ )
  22. 		printf( "after: *p[%d] %d\n", i, *p[i] );
  23.  
  24. 	return 0;
  25. }
  26.  
  27. void swap_pointer( int *pp[] ){
  28. 	int *temp = pp[0];
  29. 	pp[0] = pp[1];
  30. 	pp[1] = temp;
  31.  
  32.  
  33.  
  34. } 
  35.  
  36.  
Success #stdin #stdout 0.01s 5548KB
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stdin
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Standard input is empty
stdout
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before: p[0] 0x7ffead1184b0
before: p[1] 0x7ffead1184b4
before: *p[0] 1
before: *p[1] 2
after: p[0] 0x7ffead1184b4
after: p[1] 0x7ffead1184b0
after: *p[0] 2
after: *p[1] 1
https://ideone.com/F82jYf
Ex3-2
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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