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ruizhi

[root@ruizhi ruizhi]# vim ex.cxx
[root@ruizhi ruizhi]# g++ ./ex.cxx
In file included from /usr/include/c++/3.3.2/backward/iostream.h:31,
                 from ex.cxx:1:
/usr/include/c++/3.3.2/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <sstream> instead of the deprecated header <strstream.h>. To disable this warning use -Wno-deprecated.
[root@ruizhi ruizhi]# ./a.out
Hello World
版主批评的是，改！
附上：
# include <iostream.h>
int main()
{
         cout<<"Hello World\n";
}

sagaeon

1.去掉  .h。原因如前有一贴所述
2.cout从哪儿来？要用名字空间将它包括进来。
[code:1] #include <iostream>
int main(){
    using namespace std;
    cout<<"Hello,World!"<<endl;
    return 0;
}[/code:1]

ruizhi

谢谢版主！
我是按照参考书输入的，一直以为是我的 编译器有问题，所以拿个最简单的程序来测。

忘

要买好书   

qtduoduo

执行的时候最好加上./表示是当前目录