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void* operator new(std::size_t size) throw (std::bad_alloc);
void* operator new(std::size_t size, const std::nothrow_t& )throw();
void* operator new[](std::size_t size) throw(std::bad_alloc);
void* operator new[](std::size_t size, const std::nothrow_t&)throw();
char* p = NULL;
p = new(std::nothrow)char[100];