CSE2001: Exception Handling and Templates in C++

Exception Handling

• Errors are problems that occur in a program due to illegal operations performed by the user or programmer, also known as bugs or faults.
• There are two main types of errors in programming: compile-time errors and run-time errors.
• Compile-time errors are caught during compilation time, examples include syntax errors, library references, incorrect import of library functions and methods, and uneven bracket pairs.
• Run-time errors, also known as exceptions, are not caught during compilation time and can cause serious issues if not handled effectively.

Throwing Exceptions

• An exception is a problem that arises during the execution of a program, such as attempting to divide by zero or encountering a 'file not found' error.
• In C++, exceptions can be thrown using the throw keyword.
• Both basic data types and user-defined objects can be thrown as exceptions.

Catching Exceptions

• The catch block following the try block catches any exception.
• The type of exception to be caught is specified in parentheses following the catch keyword.
• Multiple catch statements can be used to catch different types of exceptions.

Try-Catch Block

• A try-catch block is used to separate error handling code from normal code.
• The try block contains protected code that might generate an exception.
• The catch block catches the exception and handles it.

Exception Handling in C++

• Exception handling in C++ involves using try, catch, and throw keywords to handle exceptions.
• Exception handling helps to prevent the normal execution of the system from being halted, and instead, ends the program gracefully with a proper error message.