虽然用处不多,但在做32和64位的底层通信时可以用。
32位
sizeof(char)=1
sizeof(short)=2
sizeof(int)=4
sizeof(long)=4
sizeof(float)=4
sizeof(double)=8
sizeof(long long)=8
sizeof(long double)=8
sizeof(void*)=4
64位
sizeof(char)=1
sizeof(short)=2
sizeof(int)=4
sizeof(long)=4
sizeof(float)=4
sizeof(double)=8
sizeof(long long)=8
sizeof(long double)=8
sizeof(void*)=8