Converting 4 raw bytes into 32-bit floating point

Question

I\'m trying to re-construct a 32-bit floating point value from an eeprom.

The 4 bytes in eeprom memory (0-4) are : B4 A2 91 4D

and the PC (VS Studio) recon

Answer 1

You need to cast at the pointer level.

int     myFourBytes = /* something */;
float*  myFloat = (float*) &myFourBytes;
cout << *myFloat;

Should work.

If the data is generated on a different platform that stores values in the opposite endianness, you'll need to manually swap the bytes around. E.g.:

unsigned char myFourBytes[4] = { 0xB4, 0xA2, 0x91, 0x4D };
std::swap(myFourBytes[0], myFourBytes[3]);
std::swap(myFourBytes[1], myFourBytes[2]);