For example, when dealing with the problem: “How to get the word length of the system without using sizeof () and C program?”
Even on 64-bit computers, used C compilers compile int into 32 bits. So how do I set it in C so that the int compiler word length is the same as the system word length?
Compiled with GCC on Linux, the long for 32-bit computers is 4 bytes and the long for 64-bit computers is 8 bytes.
I searched macro on VS.
INT_MAXThe definition of, seems to be only one place, is
2147483647, so there should be no way to set it, can only define a type.
And I learned that usually some projects do not directly use the default type, but redefine a set of types to use, for example, I can define a set of types like this:
#ifdef m32 typedef int SpacelanInt; typedef float SpacelanFloat; #else typedef long int SpacelanInt; typedef double SpacelanFloat; #endif