小弟玩ubuntu几个月了,最近在ubuntu上装了个编译器。
在geit中写入C++代码如下:
#include <iostream>
using namespace std;
int main()
{
int x,y;
cin>>x>>"">>y>>endl;
if(x>y)
cout<<x<<">"<<y<<endl;
else
cout<<x<<"<"<<y<<endl;
return 0;
}
用g++ -Wall filename.cpp不能编译成功
终端提示如下:
storm@storm-desktop:~$ g++ -Wall 555.cpp
555.cpp: In function ‘int main()’:
555.cpp:6: 错误: no match 为‘operator>>’在‘std::cin.std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(& x))) >> ""’中
/usr/include/c++/4.3/istream:123: 附注: 备选为: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>& (*)(std::basic_istream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/include/c++/4.3/istream:127: 附注: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_ios<_CharT, _Traits>& (*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/include/c++/4.3/istream:134: 附注: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/include/c++/4.3/istream:170: 附注: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/include/c++/4.3/istream:174: 附注: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char, _Traits = std::char_traits<char>]
/usr/include/c++/4.3/istream:177: 附注: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char, _Traits = std::char_traits<char>]
但是不用cin语句,如以下代码就可以执行
#include <iostream>
using namespace std;
int main()
{
int x=3,y=5;
if(x>y)
cout<<x<<">"<<y<<endl;
else
cout<<x<<"<"<<y<<endl;
return 0;
}
用g++编译能产生a.out文件
./a.out 后会正常显示
3<5.
这个问题我百思不得其解,望各位大虾不吝赐教。
用cin输入时显示错误
-
- 帖子: 4
- 注册时间: 2009-09-25 12:11
-
- 帖子: 3182
- 注册时间: 2006-03-10 15:10
- 来自: xi'an China
- 联系:
Re: 用cin输入时显示错误
1. 你不妨先解释一下你在代码中添加 "" 和 endl 本意是什么?或者你想做什么cin>>x>>"">>y>>endl
2. 找本C++ 的书好好看看
-
- 帖子: 4
- 注册时间: 2009-09-25 12:11
Re: 用cin输入时显示错误
额。。。我知道什么原因了,
多了个endl。
谢谢楼上的提醒!!
多了个endl。
谢谢楼上的提醒!!
- eexpress
- 帖子: 58428
- 注册时间: 2005-08-14 21:55
- 来自: 长沙