Consider the class definition:

Question

```
class IntPair { int first; int second; public: IntPair(int firstValue, int secondValue); // prefix operator++ here
// postfix operator ++ here
int getFirst( ) const;
int getSecond( ) const;
};
```

a) Give declarations for prefix and postfix versions of operator++
b) Give definitions for prefix and postfix versions of operator++

Answer 1

a) declarations:
```
const IntPair operator++( ); //Prefix version const IntPair operator++(int); //Postfix version
```
b) definitions.
```
//prefix version
const IntPair IntPair::operator++( )
{
first++;
second++; return IntPair(first, second); }

//postfix version const IntPair IntPair::operator++(int ignoreMe) { int temp1 = first;
int temp2 = second;
first++;
second++;
return IntPair(temp1, temp2);
}
```

The traditional behavior of increment operators follows. The prefix version increments, then returns the incremented value. The postfix version saves the old value, increments the stored value then returns the old value.