WAP to overload Binary + in following formats.
d1 + d2.
d1 + 4
5 + d1, where d1 and d2 are the object of Distance class
Objective
Write a C++ program to overload the binary (+) operator to handle mixed data types (Object + Object, Object + Int, Int + Object).
Algorithm / Approach
- Create a
class Distance. - Overload for Object + Object:
Distance operator+(Distance d2)(Member function). - Overload for Object + Int:
Distance operator+(int a)(Member function). - Overload for Int + Object:
friend Distance operator+(int a, Distance d)(Friend function). - Test all three equations in
main().
main.cpp
#include<iostream>
using namespace std;
class Distance {
int m, cm;
public:
Distance(int a, int b) {
m = a;
cm = b;
}
void display() {
cout<< m<<" m "<< cm<<" cm"<< endl;
}
Distance operator+(Distance d2) {
int x, y;
x = m+d2.m;
y = cm+d2.cm;
return Distance(x,y);
}
Distance operator+(int a) {
int x, y;
x = m;
y = cm+a;
return Distance(x,y);
}
friend Distance operator+(int a,Distance d);
};
Distance operator+(int a, Distance d2) {
int x, y;
x = a+d2.m;
y = d2.cm;
return Distance(x,y);
}
int main() {
Distance d(10,20);
Distance d2(50,60);
Distance d3 = d+d2;
d3.display();
Distance d4 = d+2;
d4.display();
Distance d5 = 2+d;
d5.display();
return 0;
}Expected Output
60 m 80 cm 10 m 22 cm 12 m 20 cm
Explanation of the Program
- When doing
d1 + 4, the compiler calls the member function ofd1and passes4as the argument. - However, when doing
5 + d1, the integer5is on the left. Integers are primitive types; they don't have member functions! Therefore, this specific variation MUST be handled by a globalfriendfunction that accepts both the integer and the object as arguments.
Complexity
Time Complexity
O(1)
Space Complexity
O(1)
