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Data Structure Vs File Structure, Basic Operations on File, Fragmentation,…
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Basic Operations on File
Closing a file
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Better to close the file manually to prevent any data loss in case the program doesn't terminate normally while doing operations on the file.
Reading from file
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Reading to binary object
file.read((char*)&object, sizeof(object))
Signature
istream& read (char* s, streamsize n);
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Writing on file
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Signature
ostream& write (char* s, streamsize n)
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Opening a file
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Once a file is opened, the file pointer (eg. .tellg()) is positioned at the beginning of the file
fstream file(filename, filemodes)
alternative syntax: file.open(filename, filemodes)
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Fragmentation
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External Fragmentation can be compacted, which means combine
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