求助！！！

[maozijun]

我想请问一下 怎么输出一个空格 应该用哪个转义序列？ 或者应该怎么样输出一个空格 谢谢！！！

[晨星]

C：
printf(" ");

C＋＋:
cout << '' << endl;
cout << " " << endl;

[oyd]

下面的代码可以输出一个空格了。
#pragma warning(disable:4786)

#include <iostream>

using namespace std;

class character
{
public:
virtual operator char () = 0;
};
class space : public character
{
public:
space () : m_ch ('\x20') { }
operator char () { return m_ch; }
private:
char m_ch;
};

ostream& operator << (ostream& o, character& ch) { return o << (char) ch; }

void main()
{
space SPACE;
cout << "a" << SPACE << "a";
}

[playboyxp]

直接输出
在需要得地方加printf(" ");或者cout<<" ";