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  1. #include <iostream>
  2. #include <algorithm>
  3. using namespace std;
  4.  
  5. class Vector {
  6. 	size_t size; 
  7. 	double *elem; 
  8. public:
  9.    Vector(initializer_list<double> lst)
  10.     :size{lst.size()},elem{new double[lst.size()]}
  11.     {
  12.         std::copy(lst.begin(),lst.end(),elem);
  13.     }
  14.     void test() { for (int i=0; i<size; i++) cout<< elem[i]<<" "; cout<<endl; }
  15. };
  16.  
  17. class Matrix{
  18. private:
  19.     int row;
  20.     int col;
  21.     double **elem;
  22. public:
  23.     //Default Constructor:
  24.     Matrix(int row,int col) { cout << "Other !!"<<endl; }
  25.     //Initialized list constructor:
  26.     Matrix(initializer_list<initializer_list<double>> lst) : row{lst.size()},col{0} {
  27.         for (auto &x: lst) 
  28.             if (x.size()>col)
  29.                 col = x.size();
  30.         cout<<row<<"x"<<col<<endl; 
  31.         elem=new double*[row]; 
  32.         auto it=lst.begin(); 
  33.         for (int i=0; i<row; i++, it++) {
  34.         	elem[i]=new double[col];
  35.         	std::copy(it->begin(),it->end(),elem[i]);
  36.         }
  37.     }
  38.     void test() { 
  39.         for (size_t i=0; i<row; i++) {
  40.         	for (size_t j=0; j<col; j++) 
  41.         	   cout<< elem[i][j]<<" "; 
  42.         	cout<<endl; 
  43.         }
  44.     }
  45. };
  46.  
  47. int main() {
  48. 	Vector v{1,2,3,4,5,6,7,8,9,10,11}; 
  49. 	v.test(); 
  50. 	Matrix m{ {1,2,3},{4,5,6},{7,8,9}}; 
  51. 	m.test();
  52. 	Matrix l{1,2};
  53. 	return 0;
  54. }
Success #stdin #stdout 0s 4240KB
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stdin
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Standard input is empty
stdout
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1 2 3 4 5 6 7 8 9 10 11 
3x3
1 2 3 
4 5 6 
7 8 9 
Other !!
https://ideone.com/WiDvcs
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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