01: #include <iostream>
02: using namespace std;
03: 
04: 
05: //cout 의 원리
06: namespace mystd
07: {
08:    class ostream
09:    {
10:    public:
11:       ostream& operator<<(const char* c)
12:       {
13:          printf("%s",c);
14:          return *this;
15:       }
16:       ostream& operator<<(int i)
17:       {
18:          printf("%d",i);
19:          return *this;
20:       }
21:       ostream& operator<<(ostream&(*_f)(ostream&))
22:       {
23:          return _f(*this);
24:       }
25:    };
26: 
27:    ostream& endl(ostream& os)
28:    {
29:       return os << "\n";
30:    }
31:    
32:    ostream cout;
33: 
34:    //const char* endl = "\n";
35: }
36: 
37: using namespace mystd;
38: 
39: //조정자 함수
40: ostream& twoendl(ostream& os) 
41: {
42:    return os << "\n\n";
43: }
44: ostream& tab(ostream& os)
45: {
46:    return os << "\t";
47: }
48: */
49: 
50: ostream& tab(ostream& os)
51: {
52:    return os << "\t";
53: }
54: int main()
55: {
56:    int n = 10;
57:    cout << "hello" << tab; //cout.operator<<("hello");
58:    cout << hex << n << endl;     //cout.operator<<(n);
59: }