Sur Mac OS X en C++ sur un PROCESSEUR 64 bits, il y a un type qui est en 64 bits?

En supposant que Snow Leopard (Mac OS X 10.6.2 - Intel), puis "long" est 64-bits avec le compilateur par défaut.

Spécifier "g++ -m64" et il sera probablement 64 bits sur des versions antérieures de trop.

 1 = sizeof(char)
 1 = sizeof(unsigned char)
 2 = sizeof(short)
 2 = sizeof(unsigned short)
 4 = sizeof(int)
 4 = sizeof(unsigned int)
 8 = sizeof(long)
 8 = sizeof(unsigned long)
 4 = sizeof(float)
 8 = sizeof(double)
16 = sizeof(long double)
 8 = sizeof(size_t)
 8 = sizeof(ptrdiff_t)
 8 = sizeof(time_t)
 8 = sizeof(void *)
 8 = sizeof(char *)
 8 = sizeof(short *)
 8 = sizeof(int *)
 8 = sizeof(long *)
 8 = sizeof(float *)
 8 = sizeof(double *)
 8 = sizeof(int (*)(void))
 8 = sizeof(double (*)(void))
 8 = sizeof(char *(*)(void))

Testé avec:

i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1 (Apple Inc. construire 5646) (point 1) 
Copyright (C) 2007 Free Software Foundation, Inc. 
C'est un logiciel libre; voir la source pour des conditions de copie. Il n'y a PAS de 
garantie; même pas de qualité MARCHANDE ou d'ADÉQUATION à UN USAGE PARTICULIER.

---

De la compilation avec GCC 4.7.1 sur Mac OS X 10.7.5 avec l'option -std=c99, la sortie du programme est plus vaste. Grâce à apalopohapa pour souligner la surveillance long long etc ont été absents de l'original.

 1 = sizeof(char)
1 = sizeof(unsigned char)
2 = sizeof(short)
2 = sizeof(unsigned short)
4 = sizeof(int)
4 = sizeof(unsigned int)
8 = sizeof(long)
8 = sizeof(unsigned long)
4 = sizeof(float)
8 = sizeof(double)
16 = sizeof(long double)
8 = sizeof(size_t)
8 = sizeof(ptrdiff_t)
8 = sizeof(time_t)
8 = sizeof(long long)
8 = sizeof(unsigned long long)
8 = sizeof(uintmax_t)
1 = sizeof(int8_t)
2 = sizeof(int16_t)
4 = sizeof(int32_t)
8 = sizeof(int64_t)
1 = sizeof(int_least8_t)
2 = sizeof(int_least16_t)
4 = sizeof(int_least32_t)
8 = sizeof(int_least64_t)
1 = sizeof(int_fast8_t)
2 = sizeof(int_fast16_t)
4 = sizeof(int_fast32_t)
8 = sizeof(int_fast64_t)
8 = sizeof(uintptr_t)
8 = sizeof(void *)
8 = sizeof(char *)
8 = sizeof(short *)
8 = sizeof(int *)
8 = sizeof(long *)
8 = sizeof(float *)
8 = sizeof(double *)
8 = sizeof(int (*)(void))
8 = sizeof(double (*)(void))
8 = sizeof(char *(*)(void))
1 = sizeof(struct { char a; })
2 = sizeof(struct { short a; })
4 = sizeof(struct { int a; })
8 = sizeof(struct { long a; })
4 = sizeof(struct { float a; })
8 = sizeof(struct { double a; })
16 = sizeof(struct { char a; double b; })
16 = sizeof(struct { short a; double b; })
16 = sizeof(struct { long a; double b; })
4 = sizeof(struct { char a; char b; short c; })
16 = sizeof(struct { char a; char b; long c; })
4 = sizeof(struct { short a; short b; })
6 = sizeof(struct { char a[3]; char b[3]; })
8 = sizeof(struct { char a[3]; char b[3]; short c; })
16 = sizeof(struct { long double a; })
32 = sizeof(struct { char a; long double b; })
16 = sizeof(struct { char a; long long b; })
16 = sizeof(struct { char a; uintmax_t b; })