Difference dynamic static 2d array c++
- by snorlaks
Hello,
Im using opensource library called wxFreeChart to draw some XY charts. In example there is code which uses static array as a serie :
double data1[][2] = {
{ 10, 20, },
{ 13, 16, },
{ 7, 30, },
{ 15, 34, },
{ 25, 4, },
};
dataset->AddSerie((double *) data1, WXSIZEOF(dynamicArray));
WXSIZEOF ismacro defined like: sizeof(array)/sizeof(array[0])
In this case everything works great but in my program Im using dynamic arrays (according to users input).
I made a test and wrotecode like below:
double **dynamicArray = NULL;
dynamicArray = new double *[5] ;
for( int i = 0 ; i < 5 ; i++ )
dynamicArray[i] = new double[2];
dynamicArray [0][0] = 10;
dynamicArray [0][1] = 20;
dynamicArray [1][0] = 13;
dynamicArray [1][1] = 16;
dynamicArray [2][0] = 7;
dynamicArray [2][1] = 30;
dynamicArray [3][0] = 15;
dynamicArray [3][1] = 34;
dynamicArray [4][0] = 25;
dynamicArray [4][1] = 4;
dataset->AddSerie((double *) *dynamicArray, WXSIZEOF(dynamicArray));
But it doesnt work correctly. I mean point arent drawn. I wonder if there is any possibility that I can "cheat" that method and give it dynamic array in way it understands it and will read data from correct place
thanks for help
