C++ Command Line Arguments:             When a program in C++ is compiled an executable file is created. This executable file can he used to execute the program directly from the DOS prompt. The arguments can also he passed to the program from the DOS prompt during execution of the program. The arguments that are passed to a function at the DOS prompt are called command line arguments.            ... 

Default Arguments:             The arguments in which data is initialized during the function declaration arc called default arguments. If the values of the arguments are specified in the function declaration then the arguments of the function in the function call can be omitted. If the arguments are omitted in function call then the default values are automatically passed to the function...