c++ - Compiler Independent Types -


i've seen several libraries , c++ header files provide compiler independent types don't understand quite why compiler independent.

for example:

int number; // not compiler independent  typedef unsigned int u32; u32 number2; // compiler independent

is above true? if so, why? don't quite understand why usage of typedef mean size of number2 same across compilers.

elaborating on comment,

proposition : use typedef compiler independence.

rationale : platform independence thing

implementation:

#ifdef _msc_ver     #if _msc_ver < 1400     typedef int bar;     #elif _msc_ver < 1600     typedef char bar;     #else     typedef bool bar; #else #error "unknown compiler" #endif

the preprocessor macro chain important part not typedef.

disclaimer: haven't compiled it!


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