strcpy strdup 区别？

allmycheers

如题
除了strdup 会自动用malloc ，手动free外，还有什么区别？

群雄逐鹿中原

区别都以楼主的话为基础，还能说出啥区别

allmycheers

区别都以楼主的话为基础，还能说出啥区别
群雄逐鹿中原 发表于 2010-07-19 11:18

   

hellioncu

帮助里面说得很清楚了

mirnshi

参数不同，

mgqw

楼主基本把区别说完了

没本

参考一楼即可。

langue

总的说来，copy在这里是照抄的意思，duplicate是生成一份复制品。

DESCRIPTION
       The  strcpy()  function  copies the string pointed to by src (including
       the terminating '\0' character) to the array pointed to by  dest.   The
       strings  may not overlap, and the destination string dest must be large
       enough to receive the copy. [1]

       The  strdup()  function  returns  a  pointer to a new string which is a
       duplicate of the string s.  Memory for the new string is obtained  with
       malloc(3), and can be freed with free(3). [2]


From WordNet (r) 2.0 :

  copy
       v 1: copy down as is; "The students were made to copy the
            alphabet over and over" [3]

  duplicate
       v. 3: make a duplicate or duplicates of; "Could you please
          duplicate this letter for me?" [3]

  duplicate
       n 1: something additional of the same kind; "he always carried
            extras in case of an emergency" [syn: extra]
       2: a copy that corresponds to an original exactly; "he made a
          duplicate for the files" [syn: duplication] [3]

Reference:
[1] strcpy(3)
[2] strdup(3)
[3] http://www.dict.org/bin/Dict

rain_fish

用途不同吧

yulihua49

如题
除了strdup 会自动用malloc ，手动free外，还有什么区别？
allmycheers 发表于 2010-07-19 11:16

    strcpy在已知的空间，strdup在未知的空间。