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  1. #include <iostream>
  2.  
  3. class MSG
  4. {
  5. public:
  6. 	std::string title;
  7. 	std::string msg;
  8. };
  9.  
  10. void c_way( int cLinesMax )
  11. {
  12.     // Allocate Memory
  13.     MSG *pmsg = (MSG *)malloc( cLinesMax * sizeof(MSG) );
  14.  
  15.     // Set MSG Values
  16.     for( int i = 0; i < cLinesMax; i++ )
  17.     {
  18.         pmsg[i].title = "C TITLE ";
  19.         pmsg[i].title += std::to_string( i+1 );
  20.         pmsg[i].msg = "C MESSAGE ";
  21.         pmsg[i].msg += std::to_string( i+1 );
  22.     }
  23.  
  24.     // Print MSGs
  25.     for( int i = 0; i < cLinesMax; i++ )
  26.         std::cout << pmsg[i].title << " : " << pmsg[i].msg << std::endl;
  27.  
  28.     // Delete Allocated Memory (deallocate)
  29.     free( pmsg );
  30. }
  31.  
  32. void cpp_way( int cLinesMax )
  33. {
  34.     // Allocate Memory
  35.     MSG *pmsg = new MSG[cLinesMax];
  36.  
  37.     // Set MSG Values
  38.     for( int i = 0; i < cLinesMax; i++ )
  39.     {
  40.         pmsg[i].title = "CPP TITLE ";
  41.         pmsg[i].title += std::to_string( i+1 );
  42.         pmsg[i].msg = "CPP MESSAGE ";
  43.         pmsg[i].msg += std::to_string( i+1 );
  44.     }
  45.  
  46.     // Print MSGs
  47.     for( int i = 0; i < cLinesMax; i++ )
  48.         std::cout << pmsg[i].title << " : " << pmsg[i].msg << std::endl;
  49.  
  50.     // Delete Allocated Memory (deallocate)
  51.     // delete:   deallocates one MSG instance
  52.     // delete[]: deallocates all MSG instances in array
  53.     delete[] pmsg;
  54. }
  55.  
  56. int main( int argc, char *argv[] )
  57. {
  58. 	int cLinesMax = 0;
  59. 	std::cout << "set array size: ";
  60. 	std::cin >> cLinesMax;
  61. 	std::cout << std::endl;
  62.  
  63. 	c_way( cLinesMax );
  64. 	cpp_way( cLinesMax );
  65.  
  66. 	return 0;
  67. }
  68.  
Success #stdin #stdout 0s 16064KB
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set array size: 
C TITLE 1 : C MESSAGE 1
C TITLE 2 : C MESSAGE 2
C TITLE 3 : C MESSAGE 3
CPP TITLE 1 : CPP MESSAGE 1
CPP TITLE 2 : CPP MESSAGE 2
CPP TITLE 3 : CPP MESSAGE 3
https://ideone.com/46twoD
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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