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Azrin Aris · Guest

Hi,

I'm using BCB6 and I trying to load 2D data (100x100) from 4 files into
a 200x200 array in memory. Here is the code

//Dynamically create a 200x200 data size;
short **Data;

Data = new short*[200];

for(int a=0;a<200;a++)
{
Data[a] = new short[200];
}

//Load data from files beginning top left quadrant
for(int r=0;r<2;r++)
{
for(int c=0;c<2;c++)
{
//load file according to quadrant e.g
//Data_00.dat is for array [0-99][0-99]
//Data_01.dat is for array [0-99][100-199]
//Data_10.dat is for array [100-199][0-99]
//Data_11.dat is for array [100-199][100-199]

String FileName = "Data_"+IntToStr(r)+IntToStr(c)+".dat";
TFileStream *FS =
new TFileStream(FileName,wmOpenRead|fmShareExclusive);
if(FS)
{
FS->Position = 0;

for(int l=0;l<100;l++)
{
//These variables is for calculating the offset pointer
int nr = l+(100*r);
int nc = 100*c;

FS->Read(&Data[nr][nc],sizeof(short)*100);
}
delete FS;
}
}
}

It seems I've loaded all data into the array without any problem. But
upon a closer inspection, the data for the 01,10,11 quadrant is not
accurate. Data for 01 which starts from array [0-99,100-199] is
accurate starting from [0,110] onwards. Data for 10 is accurate from
[110,0] onwards, data for 11 is accurate from [110,110] onwards.

It looks like the first quadrant 00 is taking extra space. I believe
this is a pointer issues but I cannot pin point where my mistake is. So
I'm asking for guidance from experts here to help me on this.

TIA,

Azrin

Azrin Aris · Guest

Azrin Aris wrote: