C言語なら俺に聞け 143

[0075 片山博文MZ ◆T6xkBnTXz7B0 (ﾜｯﾁｮｲ 41b3-KIob) 2017/10/30(月) 20:14:13.81 ID:ct0tj9Za0]

union endian_checker_union
{
int i; char c[sizeof(int)];
} endian_checker = { 1 };

#define IS_BIG_ENDIAN() (!endian_checker.c[0])