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  1. #include <iostream>
  2. #include <string.h>
  3. using namespace std;
  4.  
  5. class myClass
  6. {
  7.     public :
  8.  
  9.         myClass();
  10.         ~myClass();
  11.  
  12.         struct DynamicArray
  13.         {
  14.             uint8_t * data;
  15.             size_t size;
  16.         };
  17.  
  18.         void addToArray( DynamicArray & array, uint8_t * data, size_t len );
  19.  
  20. 	    DynamicArray myDynamicArray1; 
  21.         DynamicArray myDynamicArray2;
  22. };
  23.  
  24. myClass::myClass() :
  25.     myDynamicArray1( { nullptr, 0 } ),
  26.     myDynamicArray2( { nullptr, 0 } )
  27. {
  28. }
  29.  
  30. myClass::~myClass()
  31. {
  32.     if ( myDynamicArray1.data != nullptr )
  33.     {
  34.         delete[] myDynamicArray1.data;
  35.     }
  36.     if ( myDynamicArray2.data != nullptr )
  37.     {
  38.         delete[] myDynamicArray2.data;
  39.     }
  40. }
  41.  
  42. void myClass::addToArray( DynamicArray & array, uint8_t * data, size_t len )
  43. {
  44.     DynamicArray tmp;
  45.     tmp.size = array.size + len;
  46.     tmp.data = new (nothrow) uint8_t[ tmp.size ];
  47.  
  48.     if ( tmp.data != nullptr )
  49.     {
  50.         if ( array.data != nullptr )
  51.         {
  52.             memcpy( tmp.data, array.data, array.size );
  53.             delete[] array.data;
  54.         }
  55.         memcpy( tmp.data + array.size, data, len );
  56.         array.data = tmp.data;
  57.         array.size = tmp.size;
  58.     }
  59.     else
  60.     {
  61.         printf("sorry, couldn't add to array, memory allocation failed!\n");
  62.     }
  63. }
  64.  
  65.  
  66.  
  67. myClass test;
  68.  
  69. int main()
  70. {
  71.     uint8_t a[] = { 10, 20, 30, 40, 50, 60, 70 };
  72.     uint8_t b[] = { 80, 90, 100 };
  73.  
  74.     test.addToArray( test.myDynamicArray1, a, 7 );
  75.     test.addToArray( test.myDynamicArray2, b, 2 );
  76.     test.addToArray( test.myDynamicArray1, b, 3 );
  77.     test.addToArray( test.myDynamicArray2, a, 5 );
  78.  
  79.     for ( size_t i = 0; i < test.myDynamicArray1.size; i++ )
  80.     {
  81.         printf( "test.myDynamicArray1.data[%d] = %d\n", i, test.myDynamicArray1.data[i] );
  82.     }
  83.     printf( "\n" );
  84.     for ( size_t i = 0; i < test.myDynamicArray2.size; i++ )
  85.     {
  86.         printf( "test.myDynamicArray2.data[%d] = %d\n", i, test.myDynamicArray2.data[i] );
  87.     }
  88.     printf( "\n" );
  89.  
  90.     size_t totalSize = test.myDynamicArray1.size + test.myDynamicArray2.size;
  91.     uint8_t * allData = new (nothrow) uint8_t[ totalSize ];
  92.     if ( allData != nullptr )
  93.     {
  94.         memcpy( allData, test.myDynamicArray1.data, test.myDynamicArray1.size );
  95.         memcpy( allData + test.myDynamicArray1.size, test.myDynamicArray2.data, test.myDynamicArray2.size );
  96.  
  97.         for ( size_t i = 0; i < totalSize; i++ )
  98.         {
  99.             printf("allData[%d] = %d\n", i, allData[i] );
  100.         }
  101.  
  102.         delete[] allData;
  103.     }
  104.  
  105.     delete[] test.myDynamicArray1.data;
  106.     delete[] test.myDynamicArray2.data;
  107.  
  108.     return 0;
  109. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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test.myDynamicArray1.data[0] = 10
test.myDynamicArray1.data[1] = 20
test.myDynamicArray1.data[2] = 30
test.myDynamicArray1.data[3] = 40
test.myDynamicArray1.data[4] = 50
test.myDynamicArray1.data[5] = 60
test.myDynamicArray1.data[6] = 70
test.myDynamicArray1.data[7] = 80
test.myDynamicArray1.data[8] = 90
test.myDynamicArray1.data[9] = 100

test.myDynamicArray2.data[0] = 80
test.myDynamicArray2.data[1] = 90
test.myDynamicArray2.data[2] = 10
test.myDynamicArray2.data[3] = 20
test.myDynamicArray2.data[4] = 30
test.myDynamicArray2.data[5] = 40
test.myDynamicArray2.data[6] = 50

allData[0] = 10
allData[1] = 20
allData[2] = 30
allData[3] = 40
allData[4] = 50
allData[5] = 60
allData[6] = 70
allData[7] = 80
allData[8] = 90
allData[9] = 100
allData[10] = 80
allData[11] = 90
allData[12] = 10
allData[13] = 20
allData[14] = 30
allData[15] = 40
allData[16] = 50
https://ideone.com/mOS5aO
language:
C++ 4.3.2 (gcc-4.3.2)
created:
5 years ago
visibility:
secret

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