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  1. #include <iostream>
  2. #include <string>
  3. #include <cstring>
  4.  
  5. using namespace std;
  6.  
  7. struct myobject {
  8. 	int x;
  9. 	double y;
  10. 	std::string z;
  11. };
  12.  
  13. void printUC(unsigned char* data, size_t len){
  14. 	for (int i = 0; i < len; i++) {
  15.  		printf("%x", data[i]);
  16. 	}
  17. 	printf("\n");
  18. }
  19.  
  20. void printObj(const myobject& data){
  21. 	std::cout << data.x << " " << data.y << " " << data.z << '\n';
  22. }
  23.  
  24. int main() {
  25. 	// your code goes here
  26. 	myobject obj1 = {
  27. 		42, 42.42, "hello" 
  28. 	};
  29. 	unsigned char* bytes1 = new unsigned char[sizeof(obj1)];
  30. 	memcpy(bytes1, static_cast<void *>(&obj1), sizeof(obj1));
  31. 	myobject obj2 = {
  32. 		42, 42.42, "hello"
  33. 	};
  34. 	unsigned char* bytes2 = new unsigned char[sizeof(obj2)];
  35. 	memcpy(bytes2, static_cast<void*>(&obj2), sizeof(obj2));
  36.  
  37. 	printUC(bytes1, sizeof(obj1));
  38. 	printUC(bytes2, sizeof(obj2));
  39.  
  40. 	std::cout << memcmp(bytes1, bytes2, sizeof(obj1)) << '\n';
  41.  
  42. 	auto tmp = myobject{};
  43. /*	memcpy(&tmp, bytes1, sizeof(obj1));
  44. 	printObj(tmp);
  45. 	memcpy(&tmp, bytes2, sizeof(obj2));
  46. 	printObj(tmp);
  47. */	
  48. 	return 0;
  49. }
  50.  
Success #stdin #stdout 0s 16056KB
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stdin
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Standard input is empty
stdout
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2a0000000f6285c8fc2354540f032d05cff7f005000000068656c6c6f00000000000
2a0000000f6285c8fc23545402033d05cff7f005000000068656c6c6f00000000000
208
https://ideone.com/sMUQmu
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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