C++ Program to Operator Overloading (+ operator) with Explanation
C++
Medium
Classes & Objects
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1 min read
199 words
This problem helps you practice core C++ fundamentals in a practical way. It builds intuition around operator, object, two. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Overload + operator to add two objects of user-defined class.
This teaches operator overloading concept.
Logic: Define special member function for operator
Input Format
Two objects of a user-defined class.
Output Format
Result of addition of the two objects using overloaded + operator.
Constraints
• Use class objects
• Overload + operator using member function
Concept Explanation
Operator overloading allows us to define how operators work with user-defined objects.
Here, + is redefined to add data members of two objects.
Step-by-Step Logic
1.Create a class with one data member (for example value).
2.Create a constructor to initialize the value.
3.Define a special member function operator+.
4.This function takes one object as parameter.
5.Inside the function:
• Create a new object.
• Add current object’s value and parameter object’s value.
6.Return the new object.
7.Use obj1 + obj2 to call the overloaded operator.
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
class Complex {
public:
int real, imag;
Complex(int r = 0, int i = 0) {
real = r;
imag = i;
}
Complex operator + (const Complex& obj) {
Complex result;
result.real = real + obj.real;
result.imag = imag + obj.imag;
return result;
}
void display() {
cout << real << " + " << imag << "i" << endl;
}
};
void question8_operator_overload() {
Complex c1(3, 4), c2(1, 2);
Complex c3 = c1 + c2;
cout << "Result: ";
c3.display();
}
Output Example
Input:
Object1: 10
Object2: 20
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Solution Guide
Problem
Overload + operator to add two objects of user-defined class.
This teaches operator overloading concept.
Logic: Define special member function for operator
Input / Output
Input
Two objects of a user-defined class.
Output
Result of addition of the two objects using overloaded + operator.
Constraints
• Use class objects
• Overload + operator using member function
Examples
Input:
Object1: 10
Object2: 20
Explanation
Concept Explanation
Operator overloading allows us to define how operators work with user-defined objects.
Here, + is redefined to add data members of two objects.
Step-by-Step Explanation
1.Create a class with one data member (for example value).
2.Create a constructor to initialize the value.
3.Define a special member function operator+.
4.This function takes one object as parameter.
5.Inside the function:
• Create a new object.
• Add current object’s value and parameter object’s value.
6.Return the new object.
7.Use obj1 + obj2 to call the overloaded operator.
Details
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Official Solution
class Complex {
public:
int real, imag;
Complex(int r = 0, int i = 0) {
real = r;
imag = i;
}
Complex operator + (const Complex& obj) {
Complex result;
result.real = real + obj.real;
result.imag = imag + obj.imag;
return result;
}
void display() {
cout << real << " + " << imag << "i" << endl;
}
};
void question8_operator_overload() {
Complex c1(3, 4), c2(1, 2);
Complex c3 = c1 + c2;
cout << "Result: ";
c3.display();
}
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