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Friend function in c++:
class miles;
class km
{
float value;
public :
// void input();
km convert(km ,int a ) ;
void output()
cout << value;
}
};
km km :: convert(km a,int b)
a.value = b * 1.61;
return a;
class miles
int value;
public:
void input()
cout << "Enter the value\n";
cin >> value;
friend km & convert(km &,miles);
km & convert(km & a,miles b)
a= b.value * 1.61;
void main()
km a;
miles b;
clrscr();
b.input();
a= convert (a,b);
a.output();
getch();
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