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I receive a port number as 2 bytes (least significant byte first) and I want to convert it into an integer so that I can work with it. I've made this:
char buf[2]; //Where the received bytes are char port[2]; port[0]=buf[1]; port[1]=buf[0]; int number=0; number = (*((int *)port)); However, there's something wrong because I don't get the correct port number. Any ideas?
501
A byte value can be interchanged to an int value using the int. from_bytes() function. The int. from_bytes() function takes bytes, byteorder, signed, * as parameters and returns the integer represented by the given array of bytes.
The size of an int is really compiler dependent. Back in the day, when processors were 16 bit, an int was 2 bytes. Nowadays, it's most often 4 bytes on a 32-bit as well as 64-bit systems. Still, using sizeof(int) is the best way to get the size of an integer for the specific system the program is executed on.
I receive a port number as 2 bytes (least significant byte first)
You can then do this:
int number = buf[0] | buf[1] << 8; If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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