防御手法 - 啓蒙

  ( '-') gcc buffer_overflow.c -c
  buffer_overflow.c: In function ‘foo’:
  buffer_overflow.c:5:3: warning: ‘gets’ is deprecated (declared at /usr/include/stdio.h:638) [-Wdeprecated-declarations]
     gets(buf);
     ^

あ……はい。すんません