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Generic Programming Templates in C++

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Explore practical C++ template examples focusing on class templates, inheritance, and method implementations. Learn how to create template-based classes, apply inheritance with base and derived classes, and use generic operators. This lesson helps you understand how templates enhance code flexibility and reuse in real scenarios.

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Example 1: Templates in Class

C++
// templateClassTemplate.cpp
#include <iostream>
class Account{
public:
  explicit Account(double amount=0.0): balance(amount){}
  void deposit(double amount){
    balance+= amount;
  }
  void withdraw(double amount){
    balance-= amount;
  }
  
  double getBalance() const{
    return balance;
  }
private:
  double balance;
};
template <typename T, int N>
class Array{
public:
  Array()= default;
  int getSize() const;
private:
  T elem[N];
};
template <typename T, int N>
int Array<T,N>::getSize() const {
  return N;
}
int main(){
  std::cout << std::endl;
  Array<double,10> doubleArray;
  std::cout << "doubleArray.getSize(): " << doubleArray.getSize() << std::endl;
  Array<Account,1000> accountArray;
  std::cout << "accountArray.getSize(): " << accountArray.getSize() << std::endl;
  std::cout << std::endl;
}

Explanation

We have created two Array class objects, i.e., doubleArray and accountArray in lines 45 ...