Reading (<<=)
Read is the main function for reading information in from a stream. The read function must read in data in the exact same order as the write function which wrote it out. When you stream out a set of objects, you must be prepared to resurrect them in the same order. For example give objects a, b, and c which have been written to a stream, you must read the stream back into matching variables for a, b, and c, in order when reading the streamed objects back into a program's memory space. Using the same stream in the write example above , the following code shows how to read from a stream into a variable.
long y; // variable to read into
y <<= f; // do f.read(y)
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