What's the correct way to add 1 byte to a pointer in C/C++?

Question

I\'m using this code to move pointer by 1 byte now, but I\'m feeling something unclear..

int* a = (int*)malloc(sizeof(int));
void* b = ((char*)a)+1;   
         


        

Answer 1

In C99, you have the stdint.h header, which contains int8_t and uint8_t types, which are guaranteed to be 8 bits (and generally are just typedefs for char). Beyond this, there is no real language level support for bytes in C or C++, in fact the standard goes out of its way to say that sizeof for example is in units of char (and not bytes). There is also the CHAR_BIT macro which tells you the number of bits in a byte, on some platforms char was 9bits for example. Of course I'm assuming by byte you mean octet.