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double from char*

Darker666 Mar 17th, 2013 25 Never
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  1.           else if(packetID==13) {
  2.                   char position[3][8];     //X,Y,Z
  3.                   cout<<" - Player position: [\n";
  4.                   for(int coord=0; coord<3; coord++) {
  5.                     scl.read(8, position[coord]);    //Reads int bytes to char* (instance of socket class)
  6.                         for(int xx=0; xx<8; xx++)    //just looping through char* to see the contents
  7.                                 cout<<(int)position[coord][xx]<<" ";
  8.                         cout<<"\n";
  9.                         swapBytes(position[coord], 8);   //swaping bytes
  10.                         for(int xx=0; xx<8; xx++)       //Checking if swapped correctly
  11.                                 cout<<(int)position[coord][xx]<<" ";
  12.  
  13.                         cout<<"\n -> "<<(*((double*)position[coord]));
  14.                         if(coord<2)    
  15.                                 cout<<", \n\n";
  16.                   }
  17.                   cout<<"]\n";
  18.               if(!scl.ignore(41-3*8))break;   //Ignoring the rest of the data
  19.                   break;
  20.                  
  21.           }
  22. void swapBytes(char*arr, int length) {
  23.         char b;
  24.         for(int i=0; i<length; i+=2) {
  25.                 b = arr[i];
  26.                 arr[i] = arr[i+1];
  27.                 arr[i+1]=b;
  28.         }
  29. }
  30. /*PROGRAM OUTPUT*/
  31. /*
  32.  - Player position: [
  33. 64 80 43 -3 12 -3 91 -55
  34. 80 64 -3 43 -3 12 -55 91
  35.  -> 1.42249e+134,
  36.  
  37. 64 85 -89 -82 20 -128 0 0
  38. 85 64 -82 -89 -128 20 0 0
  39.  -> 1.11376e-310,
  40.  
  41. 64 85 64 0 0 0 0 0
  42. 85 64 0 64 0 0 0 0
  43.  -> 5.30507e-315]
  44. Over and out!
  45. Last packet: 13
  46.  
  47. actual position is near [63,86,309]
  48. */
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