number of bytes for a type in C++

[jrefactors]

In C++, the amount of memory used to store int is 4 bytes, or dependent
upon the hardware?
I think still dependent on the machine, since C++ compiler is platform
dependent.

Please advise. Thanks

 

[JH Trauntvein]

I believe that the standard guarantees minimum ranges for intrinsic
types. For example, I believe that the minimum range for type int is
[-32768, +32767].

Regards,

Jon Trauntvein

 

[Victor Bazarov]

In C++, the amount of memory used to store int is 4 bytes, or dependent
upon the hardware?
I think still dependent on the machine, since C++ compiler is platform
dependent.

You think right.

 

[pvinodhkumar]

It is depending upon the hardware.

According to TCPPPL,
this is what guaranteed about the sizes of fundamental types

1 = sizeof(char) <= sizeof(short) <= sizeof(int) <=sizeof(long)
1<= sizeof(bool) <= sizeof(long)
sizeof(char) <=sizeof(wchar_t) <= sizeof(long)
sizeof(float) <= sizeof(double) <= sizeof(long double)
sizeof(N) = sizeof(signed N) = sizeof(unsigned N)

 

[Mark McIntyre]

It is depending upon the hardware.

And the compiler. Think about old DOS compilers.

 

[Keith Thompson]

In C++, the amount of memory used to store int is 4 bytes, or dependent
upon the hardware?
I think still dependent on the machine, since C++ compiler is platform
dependent.

In C, it's dependent on the implementation, with some specific
constraints imposed by the standard.

But since your question is about C++, cross-posting it to comp.lang.c
was a bad idea.

Followups redirected.

 

[Rolf Magnus]

In C, it's dependent on the implementation, with some specific
constraints imposed by the standard.

The same is true for C++. The rules regarding integer type sizes are the
same in C++ as in C, with the exception that C++ doesn't know the "long
long" type.