C ++ shortcut tutorial-Chapter 11-class (end)

// -- C ++ short cut tutorial -- Chapter 11 -- class (end)
// -- Chapter 11 -- class
// -- 03/28/2006 Tues.
// -- Computer lab
// -- Liwei

 

// -- Program #7 use struct to create class
# Include <iostream>
Using namespace STD;

Struct C1 {
Int get_ I ();
Void put_ I (Int J );
PRIVATE:
Int I;
};

Int C1: get_ I ()
{
Return I;
}

Void C1: put_ I (Int J)
{
I = J;
}

Int main ()
{
C1 S;
S. put_ I (10 );
Cout <S. get_ I () <'/N ';

Return 0;
}

 

// -- Program #8 use struct to create class (this use Class)
# Include <iostream>
Using namespace STD;

Class C1 {
Int I;
Public:
Int get_ I ();
Void put_ I (Int J );
};

Int C1: get_ I ()
{
Return I;
}

Void C1: put_ I (Int J)
{
I = J;
}

Int main ()
{
C1 S;
S. put_ I (10 );
Cout <S. get_ I () <'/N ';

Return 0;
}

// -- Program #9 use Union to create class
# Include <iostream>
Using namespace STD;

Union u_type {
U_type (short int );
Void showchars ();
Short int I;
Char ch [2];
};

U_type: u_type (short int)
{
I =;
}

Void u_type: showchars ()
{
Cout <ch [0] <"" <ch [1] <'/N ';
}

Int main ()
{
U_type U (22252 );
U. showchars ();

Return 0;

}

 

 

// -- Program #10 use inline
# Include <iostream>
Using namespace STD;

Class C1 {
Int I;
Public:
Int get_ I ();
Void put_ I (Int J );
};

Inline int C1: get_ I ()
{
Return I;
}

Inline void C1: put_ I (Int J)
{
I = J;
}

Int main ()
{
C1 S;
S. put_ I (10 );
Cout <S. get_ I ();

Return 0;
}

 

 

// -- Program #11 use inline
# Include <iostream>
Using namespace STD;

Class C1 {
Int I;
Public:
Int get_ I () {return I ;};
Void put_ I (Int J) {I = J ;};
};

 

Int main ()
{
C1 S;
S. put_ I (10 );
Cout <S. get_ I ();

Return 0;
}

 

 

// -- Program #12 use object Array
# Include <iostream>
Using namespace STD;

Enum resolution {low, medium, high };

Class display {
Int width;
Int height;
Resolution Res;
Public:
Void set_dim (int w, int h) {width = W; Height = H ;};
Void get_dim (Int & W, Int & H) {W = width; H = height ;};
Void set_res (resolution R) {res = r ;}
Resolution get_res () {return res ;}
};

Char Names [3] [7] = {
"Low ",
"Medium ",
"High ",
};

Int main ()
{
Display display_mode [3];
Int I, W, h;

Display_mode [0]. set_res (low );
Display_mode [0]. set_dim (640,480 );

Display_mode [1]. set_res (medium );
Display_mode [1]. set_dim (800,600 );

Display_mode [2]. set_res (high );
Display_mode [2]. set_dim (1600,1200 );

Cout <"available display modes:/n ";

For (I = 0; I <3; I ++)
{
Cout <Names [display_mode [I]. get_res ()] <":";
Display_mode [I]. get_dim (W, H );
Cout <W <"by" <H <'/N ';
}

Return 0;
}

 

 

 

// -- Program #13 Use object Array
# Include <iostream>
Using namespace STD;

Class SAMP {
Int;
Public:
SAMP (int n) {A = N ;}
Int get_a () {return ;}
};

Int main ()
{
SAMP samparray [4] = {-1,-2,-3,-4 };
Int I;

For (I = 0; I <4; I ++)
Cout <samparray [I]. get_a ();
 
Cout <'/N ';

Return 0;

}

 

 

 

// -- Program #14 Use object Array
# Include <iostream>
Using namespace STD;

Class SAMP {
Int A, B;
Public:
SAMP (int n, int m) {A = N; B = m ;}
Int get_a () {return ;}
Int get_ B () {return B ;}
};

Int main ()
{
SAMP samparray [4] = {SAMP (1, 2), SAMP (3, 4), SAMP (5, 6), SAMP (7, 8 )};
Int I;

For (I = 0; I <4; I ++)
Cout <samparray [I]. get_a () <''<samparray [I]. get_ B () <'/N ';
 
Cout <'/N ';;

Return 0;

}

 

 

 

 

// -- Program #15 use object point
# Include <iostream>
Using namespace STD;

Class p_example {
Int num;
Public:
Void set_num (INT Val) {num = val ;}
Void show_num ();
};

Void p_example: show_num ()
{
Cout <num <'/N ';
}

Int main ()
{
P_example OB, * P;

Ob. set_num (1 );
Ob. show_num ();

P = & ob;
P-> show_num ();

Return 0;
}

 

 

 

// -- Program #16 use object point
# Include <iostream>
Using namespace STD;

Class p_example {
Int num;
Public:
Void set_num (INT Val) {num = val ;}
Void show_num ();
};

Void p_example: show_num ()
{
Cout <num <'/N ';
}

Int main ()
{
P_example ob [2], * P;

Ob [0]. set_num (10 );
Ob [1]. set_num (20 );

P = & ob [0];
P-> show_num ();

P ++;
P-> show_num ();

P --;
P-> show_num ();

Return 0;
}