C++ code returning incorrect information on raspberry pi

[Proxxy0]

I am using the C version of this code and I am running it using a C++ compiler on a raspberry pi and I am unable to get correct altimeter data, whilst the temperature data appears to be moderately correct. I also want to know if it'd be possible to run the code with little, or no, sleep function in the code, as what I am attempting to use it for needs to run as fast as possible. Thanks for any help!

[Ret0-z]

line 56:
int tHeight = ((data[1] * 65536) + (data[2] * 256 + (data[3] & 0xF0)) / 16);
it should be:
int tHeight = ((data[1] * 65536) + (data[2] * 256) + (data[3] & 0xF0)) / 16);