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C++ : arrays considerations

Started by penetrator Jun 27, 2005 at 3:53 PM 1 replies 750+ views

Original Post

Jun 27, 2005 at 3:53 PM

I'm building a program that has to load several image files on different sizes and store values in an array. I was planning to have an array such as: float image_data[IMAGE_INDEX][IMAGE_X * IMAGE_Y]; Problem is that since any image will have a different size (i mean different numbers of x and y pixels), and IMAGE_X * IMAGE_Y must be a constant, i can only put an extremely high IMAGE_X * IMAGE_Y value and fill the array. In practice, if the image is 300x300 and IMAGE_X * IMAGE_Y is 1024x1024, i will have an array filled with values and with a long tail of 0's. To my knowledge there is no way to dinamically resize an array in C++ , so i'd like to know what possible "tricks" i might use. Thanks

DigitalDelusion

Jun 27, 2005 at 3:57 PM

Dynamic memory allocations maybe? Those flashy new/delete operators aren't just there because they look good ;) std::vector is another friendly and extremly flexible alternative.

penetrator

Jun 27, 2005 at 4:06 PM

I found that something like this would do:

int cippa=1024;
int *buff = new int[cippa];
for (int i = 0; i < cippa; i++)
{
buff = 52;
}

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