バイトオーダーとか

ポインターとキャストが（いずれ）わかったら、出力結果（表示）を予測してみよう。

#include 
main() {

  unsigned char c4[4] = {0x01, 0x02, 0x03, 0x04};

  unsigned short s2[2] = {0x0001, 0x0002};

  char *str = "hello";
  unsigned u1 = *(unsigned *)c4;

  unsigned u2 = *(unsigned *)s2;

  unsigned u3 = *(unsigned *)str;

  printf("u1 (from c4) = %x\n", u1);

  printf("u2 (from s2) = %x\n", u2);

  printf("u3 (from str) = %x\n", u3);

}