Step by Step solution about How to resolve the algorithm Function definition step by step in the C++ programming language

This code implements three versions of the multiply function, each with a different signature and behavior.

• The first function, multiply, is a C-style function that takes two double parameters and returns their product. This function is declared as inline, which means that the compiler may inline the function call into the caller's code, improving performance.

• The second function, multiply, is a C++ template function that takes two parameters of the same type and returns their product. This function is declared with the typename keyword, which allows the compiler to deduce the type of the parameters.

• The third function, multiply, is a C++ generic function that takes two parameters of any type and returns their product. This function is declared with the auto keyword, which allows the compiler to deduce the type of the parameters and the return value.

The following table summarizes the key differences between the three functions:

In general, it is best to use the most specific version of the multiply function that is available. If you are only working with double values, then you should use the multiply(double, double) function. If you are working with a specific type, such as int or float, then you should use the multiply(Number, Number) function. If you are working with values of any type, then you should use the multiply(auto, auto) function.

inline double multiply(double a, double b)
{
   return a*b;
}


template<typename Number>
  Number multiply(Number a, Number b)
{
   return a*b;
}


auto multiply(auto a, auto b)
{
   return a*b;
}