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Hello,
Kindly explain me the function of wchar_t ,size_t ,memcpy() i have read many times the community members using this but i never realised what they are for?If anybody could explain me the syntax and use of it or could link me to some page which explain's its usage i will be very thankful
Also explain me the function of realloc()
wchar_t is the data type for unicode, at least within Windows environment. If you don't know what unicode is, perhaps you should read up about it on wikipedia or such...
size_t is a data type used by the C++ Standard Library. It's generally a "reserved" type returned by some functions and shouldn't be cast, if possible.
memcpy is a function that copies n bytes of memory from one location to another. Generally avoided in C++ since it's more a C function.
realloc takes an existing allocation from malloc and resizes it to the new specified size. If it can't expand the current memory block, it allocates a new region of the specified size, copies data over and frees the old one. Is not to be used with new/delete. Avoid if possible. Use only with malloc/free.
wchar_t is the standard "wide character" data type. What that means depends on the compiler.
size_t is primarily the result type of the sizeof operator. It is also used for various other size values in the CRT.