不多说了，代码说明一切。
/home/tong/Src/copyleft/test [tong@T7] [:]
> gcc .c /home/tong/Src/copyleft/test [tong@T7] [:]
> g++ .c
.c: In function ‘int main(int, char**)’:
.c::: error: invalid conversion from ‘void*’ to ‘int*’ [-fpermissive]
p = q;
^ /home/tong/Src/copyleft/test [tong@T7] [:]
> cat .c
#include <stdio.h> int main(int argc, char** argv)
{
int* p;
void* q; p = q; return ;
} /home/tong/Src/copyleft/test [tong@T7] [:]
>