gcc Variable-length_array

http://en.wikipedia.org/wiki/Variable-length_array

意味着gcc下,这么写是可以的:

#include <stdio.h>

int main() {
int buff_size = 1234;
char char_buff[buff_size];
printf("size:%d", sizeof(char_buff));
return 0;
}

VS2008下是不行的,

仍需要:　const int buff_size = 1234;  以示说明.