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  1. //#include "stdafx.h"
  2. #include "iostream"
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8. 	const int Nmax = 3;
  9. 	float a[Nmax][Nmax], b[Nmax], x[Nmax];
  10.  
  11. 	int n;
  12. 	cin >> n;
  13.  
  14. 	for (int i = 0; i < n; ++i)
  15. 		for (int j = 0; j < n; ++j)
  16. 			cin >> a[i][j];
  17.  
  18. 	for (int i = 0; i < n; ++i)
  19. 		cin >> b[i];
  20.  
  21. 	cout << endl;
  22.  
  23.  
  24. 	for (int k = 0; k < 1; ++k) {
  25.  
  26. 		int for_swap = k;
  27. 		for (int i = k + 1; i < n; ++i) {
  28. 			if (a[for_swap][k] < a[i][k])
  29. 				for_swap = i;
  30. 		}
  31. 		for (int i = 0; i < n; ++i)
  32. 			swap(a[for_swap][i], a[k][i]);
  33.  
  34. 		// нормируем 
  35.  
  36. 		for (int i = k; i < n; ++i) {
  37. 			for (int j = k; j < n; ++j) {
  38. 				float tmp = a[i][j] / a[i][k] * 1.0f;
  39. 				a[i][j] = tmp;
  40. 				cout << tmp << ' ';
  41. 			}
  42. 			cout << endl;
  43. 		}
  44.  
  45. 	}
  46.  
  47. 	cout << endl;
  48. 	/*for (int i = 0; i < n; ++i) {
  49. 		for (int j = 0; j < n; ++j)
  50. 			cout << a[i][j] << ' ';
  51. 		cout << endl;
  52. 	}*/
  53.  
  54. 	//system("pause>>void");
  55.  
  56.     return 0;
  57. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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3
2 3 4
5 2 1
2 4 1

36 47 37
stdout
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1 2 1 
1 3 4 
1 4 1
https://ideone.com/n6m3eE
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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