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1) friend public, protected, private.

2) friend : , , .

3) . , , , .

20

float, double, int, long +, -, *, /, %, +=, -= . , , .

-, : plus () , plusequal () += .. . +, += . .

, :., .*, ::, ?:.

:

1) , ;

2) , friend ( ) .

. :

_& operator (_& )

+= .

# include <stdio.h>

Class comp

{

Float Re, Im;

public:

Comp (float a, float b)

{

Re=a;

Im=b;

}

comp& operator += (comp& x)

{

Re+=x.Re;

Im+=x.Im;

return *this;

}

void put_info (char *Str)

{

printf (%s.Re=%f %s.Im=%f\n, Str, Re, Str, Im);

}

};

Void main ()

{

Comp C1 (2, -2), C2 (-2, 2);

C1+=C2;

C1.put_info (C1);

}

 

+= 1 . += this. . *this. , . :

friend comp operator + (comp& C1, comp& C2);

, . :

# include <stdio.h>

Class comp

{

Float Re, Im;

public:

Comp (float a, float b)

{

Re=a;

Im=b;

}

Comp ()

{

}

friend comp operator + (comp& C1, comp& C2);

void put_info (char *Str)

{

printf (%s.Re=%f %s.Im=%f\n, Str, Re, Str, Im);

}

};

Void main ()

{

Comp C1 (2, -2), C2 (-2, 2);

Comp C3;

C3=C1+C2;

C3.put_info (C3);

}

comp operator + (comp& C1, comp& C2);

{

Comp V;

V.Re=C1.Re + C2.Re;

V.Im=C1.Im + C2.Im;

Return V;

}

:

1) , float, double, int, long, -;

2) - float, double, int, long;

3) - , , ;

4) - ;

5) operator = () - .

 

21

-

- - , . , , . static.

static _-.

,

lass A

{

static int x; //

:::::

};

int A:: x = 125; //

. . ! , static, . . , , . , , :

_:: _=.

, , , .

 





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