????????????????????????????????????C????胁???芯???????婕�?????????????????????????????????????????OS?????????泄?????????????32bits??????????VC++?????????int??????4????????tuborC??????2??????
????????int??long int??short int???????????????????????屑????????????ANSI/ISO????????
????sizeof(short int)<=sizeof(int)
????sizeof(int)<=sizeof(long int)
????short int??????16位??2????
????long int??????32位??
??????????????位?????????渭????????????????????????
16位??????
char ??1?????
char*(????????): 2?????
short int : 2?????
int??  2?????
unsigned int : 2?????
float:  4?????
double:   8?????
long:   4?????
long long:  8?????
unsigned long:  4?????
32位??????
char ??1?????
char*????????????: 4??????32位?????????2^32?? ??32??bit?????4?????????64位????????
short int : 2?????
int??  4?????
unsigned int : 4?????
float:  4?????
double:   8?????
long:   4?????
long long:  8?????
unsigned long:  4?????
64位??????
char ??1?????
char*(????????): 8?????
short int : 2?????
int??  4?????
unsigned int : 4?????
float:  4?????
double:   8?????
long:   8?????
long long:  8?????
unsigned long:  8?????