not able to save an image file using c?

Question

I tried to clone a bmp image into another bmp image but the final image would not open.

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Answer 1

BMP stores each row in a multiple of 4 bytes. In your case, that means that each rows takes 116 bytes, (2 bytes padding). That gives 116x78x3+54=27198 So you are doing it wrong.

BTW the header length not always is 54 bytes.

Answer 2

BMP images need padding so each line is a multiple of 4 bytes.

Your lines are not a multiple of 4, so you're missing 2 bytes per line, or 162 in total - which is the difference in size.