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  1. // C++
  2. #include <stdio.h>
  3. #include <string.h>
  4. #define PRINT_CHAR(chr) printf("\t"#chr"=%c\n",chr)
  5. const unsigned CORRESPOND[] = {0,2,3,1};	// 對應順序 A->第0個字元, B->第2個字元 , ...
  6. class TEST
  7. {
  8. private:
  9. 	char chrData[4];
  10. public:
  11. 	char &chrA, &chrB, &chrC, &chrD;
  12. 	TEST(const char* data) :chrA(chrData[CORRESPOND[0]]), chrB(chrData[CORRESPOND[1]]), chrC(chrData[CORRESPOND[2]]), chrD(chrData[CORRESPOND[3]]) 
  13. 	{
  14. 		memcpy(chrData, data, 4 * sizeof(char));
  15. 	}
  16. 	TEST(const TEST &cpy) :TEST(cpy.chrData) 
  17. 	{
  18. 	}
  19. public:
  20. 	void ShowABCD()const 
  21. 	{
  22. 		PRINT_CHAR(chrA);
  23. 		PRINT_CHAR(chrB);
  24. 		PRINT_CHAR(chrC);
  25. 		PRINT_CHAR(chrD);
  26. 	}
  27. 	void ShowDataArray()const 
  28. 	{
  29. 		PRINT_CHAR(chrData[0]);
  30. 		PRINT_CHAR(chrData[1]);
  31. 		PRINT_CHAR(chrData[2]);
  32. 		PRINT_CHAR(chrData[3]);
  33. 	}
  34. };
  35.  
  36. int main()
  37. {
  38. 	TEST t1("0123");
  39. 	printf("\nThe Data of t1:\n");
  40. 	t1.ShowABCD();
  41. 	t1.ShowDataArray();
  42.  
  43. 	t1.chrB = 'B';
  44. 	TEST t2(t1);
  45. 	printf("\nThe Data of t2:\n");
  46. 	t2.ShowABCD();
  47. 	t2.ShowDataArray();
  48.     return 0;
  49. }
  50.  
  51.  
Success #stdin #stdout 0s 3468KB
comments (?)
stdin 
Standard input is empty
stdout 
The Data of t1:
	chrA=0
	chrB=2
	chrC=3
	chrD=1
	chrData[0]=0
	chrData[1]=1
	chrData[2]=2
	chrData[3]=3

The Data of t2:
	chrA=0
	chrB=B
	chrC=3
	chrD=1
	chrData[0]=0
	chrData[1]=1
	chrData[2]=B
	chrData[3]=3
https://ideone.com/08OQ0a
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
secret

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