>>405
とりあえず↓だと
#include<stdio.h>
int main(int argc, char **argv)
{
char a1[1];
char a2[2];
char a17[17];
char a33[33];

printf("sizeof(a1) = %d\n", sizeof(a1));
printf("sizeof(a2) = %d\n", sizeof(a2));
printf("sizeof(a17) = %d\n", sizeof(a17));
printf("sizeof(a33) = %d\n", sizeof(a33));
return 0;
}
実行結果　こうなる。
sizeof(a1) = 1
sizeof(a2) = 2
sizeof(a17) = 17
sizeof(a33) = 33

gccは
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-pc-cygwin/4.5.3/lto-wrapper.exe
Target: i686-pc-cygwin
--中略--
Thread model: posix
gcc version 4.5.3 (GCC)