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Templates and Exception Handling

Templates​

1.What is a Function Template ?​

Using templates we can create generic functions. We can use one function with several different types of data without having to explicitly recode specific versions for each data type.

Syntax:

template <class Type1, class Type2>
return_type funName(param_list)
{
    // Function Body
}

2.What is a class Template ?​

Using templates we can create generic classes. We can use one class with several different types of data without having to explicitly recode specific versions for each data type.

Syntax:

template <class Type1, class Type2>
class className
{
    //Code
}
className <Type1, Type2>obj;

3.What is Explicitly over loading /explicit specialization ?​

Even through a generic function/class overloads itself needed we can explicitly over loaded one too. This is formally called as explicit specialization.

template<> construct to indicate specialization.

Exception Handling​

1.What is Exception handling?​

Exception handling allows to manage runtime errors in an orderly fashion. Exception handling build upon 3 keywords: Try, Throw, Catch.

2.Define Try, Throw, Catch ?​

Try: Program statements that we want to monitor for exceptions are contained in try block.

Throw: If an exception i.e. error occurs within the try block, it is thrown using throw.

Catch: The exception is caught using catch and processed.

3.What is the order of placing base and derived class Expections in try catch blocks ?​

To catch base class exception put always derived class object first in the catch blocks.