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  1. //(c)Terminator
  2. #include <iostream>
  3. #include <iterator>
  4. using namespace std;
  5.  
  6.  
  7.  
  8. int main(void){
  9. 	const int N = 3;
  10.  
  11. 	int ma[N][N] = {
  12. 		{ 1, 2, 3 },
  13. 		{ 4, 3, 1 },
  14. 		{ 0, 1, 2 }
  15. 	};
  16.  
  17. 	int mb[N][N] = {
  18. 		{ 2, 1, 8 },
  19. 		{ 3, 4, 1 },
  20. 		{ 9, 4, 2 }
  21. 	};
  22.  
  23. 	int mc[N][N];
  24. 	int i;
  25.  
  26.  
  27. 	//перемножение
  28. 	for(int ir = 0; ir < N; ++ir) {
  29. 		for(int c = 0; c < N; ++c) {
  30. 			mc[ir][c] = 0;
  31. 			for(int r = 0; r < N; ++r) 
  32. 				mc[ir][c] += ma[ir][r] * mb[r][c];
  33. 		}
  34. 	}
  35.  
  36. 	//вывести результирующею матрицу
  37. 	ostream_iterator<int> _op(cout, "\t");
  38. 	for(i = 0; i < N; ++i){
  39. 		copy(mc[i], mc[i] + N, _op);
  40. 		cout << endl;
  41. 	}
  42.  
  43. 	//...
  44.  
  45. 	//транспонирование
  46. 	for(i = 0; i < N; ++i) {
  47. 		for(int j = i; j < N; ++j)
  48. 			swap(mc[i][j], mc[j][i]);
  49. 	}
  50.  
  51. 	cout << endl;
  52. 	for(i = 0; i < N; ++i){
  53. 		copy(mc[i], mc[i] + N, _op);
  54. 		cout << endl;
  55. 	}
  56. 	return 0;
  57. }
  58.  
Success #stdin #stdout 0s 3340KB
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stdin
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Standard input is empty
stdout
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35	21	16	
26	20	37	
21	12	5	

35	26	21	
21	20	12	
16	37	5
https://ideone.com/ZdnNMF
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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