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Generic Programming Templates in C++

- Solution

Explore how to use C++ template functions to sum a list of arguments both without and with an initial starting value. Understand the implementation details of variadic templates in sum and sumWithStart functions to improve flexible and reusable code with templates.

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Solution Review

C++
// sum.cpp
#include <iostream>
template<typename ...Args>     // Without an initial value
auto sum(Args&& ... args){
    return ( ... + args);
}
template<typename T, typename ...Args>          // with an initial value    
auto sumWithStart(T&& t, Args&& ... args){
    return ( t + ... + args);
}
int main(){
  std::cout << sum(1, 2, 3) << std::endl;
  std::cout << sumWithStart(20, 1, 2, 3) << std::endl;
}

Explanation

In the above code, we have ...