📌 Template Examples in C++

 

Templates in C++ allow writing generic functions and classes, enabling code reusability for different data types.

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1️⃣ Addition using Template

📌 Using a template function to add two numbers of any data type.

#include <iostream>
using namespace std;

// Template function for addition
template <typename T>
T add(T a, T b) {
    return a + b;
}

int main() {
    cout << "Addition of integers: " << add(10, 20) << endl;
    cout << "Addition of floats: " << add(5.5, 2.3) << endl;
    cout << "Addition of doubles: " << add(4.2, 3.8) << endl;

    return 0;
}

🔹 Output

Addition of integers: 30
Addition of floats: 7.8
Addition of doubles: 8.0

📌 Key Points:
✔ template <typename T> makes add(T a, T b) work with any data type.
✔ The same function is used for int, float, and double without rewriting code.

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2️⃣ Data Types Example using Template

📌 Using a template class for multiple data types.

#include <iostream>
using namespace std;

// Template class
template <typename T>
class Data {
private:
    T value;
public:
    Data(T val) { value = val; }
    void display() { cout << "Value: " << value << endl; }
};

int main() {
    Data<int> obj1(100);        // Integer type
    Data<float> obj2(45.6);     // Float type
    Data<string> obj3("Hello"); // String type

    obj1.display();
    obj2.display();
    obj3.display();

    return 0;
}

🔹 Output

Value: 100
Value: 45.6
Value: Hello

📌 Key Points:
✔ template <typename T> makes the class flexible for different data types.
✔ We created objects for int, float, and string without defining separate classes.

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📌 Summary

✔ Templates enable code reusability for multiple data types.
✔ Function templates allow writing a single function for various data types.
✔ Class templates allow defining generic classes for different data types.

🚀 Want more template examples? Let me know! 🔥