Question

I have a short int, which is 2 bytes, but I only want to output the left byte to a file. How do I do this? I’m using binary functions open(), read(), write(), etc.

I would also like to shift the right byte to the left 8 times, so that the right byte occupies the left, and the right has been cleared to all 0’s.

I apologize for not showing what I’ve already tried — I’m a C noobie and cannot find anything about how to do this.

Answer 1

You could try this approach

    int someNum = 0x1234;
    int  leftByte, rightByte;

    leftByte = (someNum >> 8) & 0xff;
    rightByte = (someNum) & 0xff;