Four sequential bytes; Need to remove high order bit in each to get correct output

[GrandSean]

So sounds like you want to treat the 4 bytes as a single 28-bit number. In that case I would:

* initialize total to zero
* starting with the high-order byte, loop over the four bytes
** shift the total left by 7 bits (total << 7)
** add the current byte & 127 to the total.

Okay, I get the concept but am having a problems translating it to code.
Just to make sure we are on the same page, I read 4 consecutive bytes (total of 32 bits) from
a file and I need to make a 28 bit number by removing the most significant bit from each byte.