Mac的同学，编译运行一下这个代码把结果贴出来吧（应该都是64位的吧）谢谢

prolj

#include <iostream> using namespace std; int main(int argv, char ** argc) { &nbsp;&nbsp;&nbsp;&nbsp;cout<< "char " << sizeof(char) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "short "<< sizeof(short) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "int " << sizeof(int) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "long " << sizeof(long) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "long long " << sizeof(long long) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "float " << sizeof(float) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "double " << sizeof(double) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "long double " << sizeof(long double) << endl; &nbsp;&nbsp;&nbsp;&nbsp;cout<< "pointer " << sizeof(void*) << endl; &nbsp;&nbsp;&nbsp;&nbsp;return 0; }

YaoFei

char 1
short 2
int 4
long 4
long long 8
float 4
double 8
long double 16
pointer 4

yfmacpro:tmp yaofei$ gcc -v
Using built-in specs.
Target: i686-apple-darwin9
Configured with: /var/tmp/gcc/gcc-5465~16/src/configure --disable-checking -enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/usr/lib --build=i686-apple-darwin9 --with-arch=apple --with-tune=generic --host=i686-apple-darwin9 --target=i686-apple-darwin9
Thread model: posix
gcc version 4.0.1 (Apple Inc. build 5465)

YaoFei

yfmacpro:tmp yaofei$ g++ -o a -m64 a.cc
yfmacpro:tmp yaofei$ ./a
char 1
short 2
int 4
long 8
long long 8
float 4
double 8
long double 16
pointer 8

prolj

谢谢YF