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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. /*
  6. 	int n = 3;
  7. 	cout <<sizeof(n) <<endl;
  8. 	cout <<sizeof(int) <<endl;
  9. */	
  10. 	int a[5] = { 3, 2, 1, 4, 5 };
  11. /*
  12. 	cout <<a <<endl; // a에 들어있는 주소가 찍힌다
  13. 	cout <<sizeof(a) <<endl;
  14.  
  15. 	int* p = a;
  16. 	cout <<sizeof(p) <<endl;
  17. 	cout <<p <<" 주소 안에 값은 " << *p<<endl;
  18. 	cout <<p[0] <<endl;
  19. 	cout <<p + 2<<"주소 안에 값은 " << *(p+2)<<endl;
  20. 	cout <<p[2] <<endl;
  21. 	cout <<*(a+2) <<endl;
  22. */
  23.  
  24. /*
  25. 	int sum = 0;
  26. 	for(int i=0; i<5; ++i) {
  27. 		// sum += a[i]; // *(a+i);
  28. 		sum += i[a]; // 이렇게 쓰면 안되지만 그냥 개념상 예제로
  29. 	}
  30. 	cout <<sum <<endl;
  31.  
  32. 	sum = 0;
  33. 	for(int* p=a; p != a+5; ++p) {
  34. 		sum += *p;
  35. 	}
  36. 	cout <<sum <<endl;
  37. */
  38. 	int a2[4][5] = { {1,2,3,4,5}, {1,2,3,4,5}, {1,2,3,4,5}, {1,2,3,4,5} };
  39.  
  40. 	cout <<sizeof(a2) <<endl;
  41. 	cout <<sizeof(a2[3]) <<endl;
  42.  
  43. 	// auto p = a2;
  44.  
  45. 	return 0;
  46. }
Success #stdin #stdout 0s 3460KB
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https://ideone.com/WhffEO
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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