NEWBIE：如何从字符串构造系统调用 [英] NEWBIE: how to construct a system call from strings
问题描述
大家好，
如何构建多个字符串如何构造变量以传递给
system（）：
说日期命令
string str =" 14/10/08 19:06:09" ;;
strDD = str.substr（0,2 ）;
strMM = str.substr（3,2）;
strYY = str.substr（6,2）;
strhh = str.substr（9,2）;
strmm = str.substr（12,2）;
strss = str.substr（15,2）;
STRT<<"日期-u"<< strMM<< strDD<< strhh<< strmm<< strYY<<"。"< ;< str ss<<
2>& 1> / dev / null;"<< endl;
system（strT）;
当我编译它时抛出
rtchk.cpp：在函数`int main（int，char **）''：
rtchk.cpp：59：不匹配`string& << const char [9]''
所以我可能是语法错误，但我是新手。
如果有拼写错误，我可以没看到。
Hi all,
Having several strings how do I construct variable to pass to
system():
Lets say the date command
string str = "14/10/08 19:06:09";
strDD = str.substr(0,2);
strMM = str.substr(3,2);
strYY = str.substr(6,2);
strhh = str.substr(9,2);
strmm = str.substr(12,2);
strss = str.substr(15,2);
strT<<"date -u "<<strMM<<strDD<<strhh<<strmm<<strYY<<"."<<str ss<< "
2>&1 >/dev/null;"<<endl;
system(strT);
when I compile it throws
rtchk.cpp: In function `int main (int, char **)'':
rtchk.cpp:59: no match for `string & << const char[9]''
so i could be a syntax error, but I''m newbie.
if there is a typo, I can''t see it.
推荐答案
Atropo写道：
Atropo wrote:
大家好，
Hi all,
上次你问的答案有什么问题？
-
Ian Collins
What''s wrong with the answer I gave last time you asked?
--
Ian Collins
15月15日17:54，Ian Collins< ian-n ... @ hotmail.comwrote：
On 15 oct, 17:54, Ian Collins <ian-n...@hotmail.comwrote:
Atropo写道：
Atropo wrote:
大家好，
Hi all,
什么是我上次你问的答案错了吗？
-
Ian Collins
What''s wrong with the answer I gave last time you asked?
--
Ian Collins
对不起伊恩。我虽然这些帖子在几个小时之后被删除了刷新
这个帖子从未显示的网页..
Sorry Ian. I though those post were deleted after hours refreshing
the webpage this post never shows..
Atropo写道：
Atropo wrote:
15月15日17:54，Ian Collins< ian-n ... @ hotmail.comwrote：
On 15 oct, 17:54, Ian Collins <ian-n...@hotmail.comwrote:
> Atropo写道：
>Atropo wrote:
>>大家好，
>>Hi all,
我上次给出的答案有什么问题你问过吗？
What''s wrong with the answer I gave last time you asked?
*请*不要引用签名。
*Please* don''t quote signatures.
>
对不起伊恩。我虽然这些帖子在数小时后删除了刷新
这个帖子从未显示的网页..
>
Sorry Ian. I though those post were deleted after hours refreshing
the webpage this post never shows..
Usenet不是IM，你有给消息传播时间。那个可怕的谷歌界面似乎让事情变得更糟。
-
Ian Collins
Usenet isn''t IM, you have to give messages time to propagate. That
dreadful google interface appears to make things worse.
--
Ian Collins
这篇关于NEWBIE：如何从字符串构造系统调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
