?? e3.cpp
字號:
#include<iostream.h>
class Sample
{
int n;
public:
Sample(){}
Sample(int i){n=i;}
friend Sample operator-(Sample &,Sample &);
friend Sample operator+(Sample &,Sample &);
void disp(){cout<<"n="<<n<<endl;}
};
Sample operator-(Sample &s1,Sample &s2)
{
int m=s1.n-s2.n;
return Sample(m);
}
Sample operator+(Sample &s1,Sample &s2)
{
int m=s1.n+s2.n;
return Sample(m);
}
void main()
{
Sample s1(10),s2(20),s3;
s3=s2-s1;
s3.disp();
s3=s2+s1;
s3.disp();
}
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