?? plusoperator.cpp
字號:
// Listing 14.5
//Overload operator plus (+)
#include <iostream>
class Counter
{
public:
Counter();
Counter(int initialValue);
~Counter(){}
int GetItsVal()const { return itsVal; }
void SetItsVal(int x) {itsVal = x; }
Counter operator+ (const Counter &);
private:
int itsVal;
};
Counter::Counter(int initialValue):
itsVal(initialValue)
{}
Counter::Counter():
itsVal(0)
{}
Counter Counter::operator+ (const Counter & rhs)
{
return Counter(itsVal + rhs.GetItsVal());
}
int main()
{
Counter varOne(2), varTwo(4), varThree;
varThree = varOne + varTwo;
std::cout << "varOne: " << varOne.GetItsVal()<< std::endl;
std::cout << "varTwo: " << varTwo.GetItsVal() << std::endl;
std::cout << "varThree: " << varThree.GetItsVal()
<< std::endl;
return 0;
}
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