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Point(float a=0,float b=0,float c=0):x(a),y(b),z(c){} Point operator ++(); Point operator --(); Point operator ++(int); Point operator --(int); void show() { cout<<\ <<\ } };

Point Point::operator ++() { return Point(++x,++y,++z); }

Point Point::operator --() { return Point(--x,--y,--z); }

Point Point::operator ++(int) { Point temp; temp.x=x++; temp.y=y++; temp.z=z++; return temp; }

Point Point::operator --(int) { Point temp; temp.x=x--; temp.y=y--; temp.z=z--; return temp; }

void main() { Point a(1,1,1),b(2,2,2),c,d; cout<<\ a.show(); cout<<\ b.show(); cout<

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cout<<\ cout<<\ c.show(); cout<

#include using namespace std; class Complex { float real,image; public: Complex(float a,float b):real(a),image(b){} Complex(){} friend bool operator ==(Complex &x,Complex &y) {return (x.real==y.real&&x.image==y.image);} };

void main() { Complex Cp1(1,2),Cp2(3,4),Cp3(1,2); cout<<(Cp1==Cp2)<

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#include using namespace std; class Complex { float real,image; public: Complex(float x,float y):real(x),image(y){} Complex(){} Complex operator +(Complex &a) {return Complex(real+a.real,image+a.image);} Complex operator -(Complex &b) {return Complex(real-b.real,image-b.image);} friend ostream & operator <<(ostream &output,Complex &c) { output<<'('<