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[C++] from stream to vector

Started by Trillian Jul 27, 2007 at 10:17 AM 1 replies 500+ views

Original Post

Jul 27, 2007 at 10:17 AM

Hello! Could anyone refresh my memory about the stl trickery involved in reading from a stream (actually std::ifstream) to a std::vector. I want to read an amount of chars known only at runtime. I tryed : myVector.reserve(charCount); myStream.read(&myVector[0], sizeof(char)*charCount); But then operator [0] throws an out of range exception.

SiCrane

Jul 27, 2007 at 10:21 AM

For the full stream:

  myVector.assign( std::istreambuf_iterator<char>(myStream),                   std::istreambuf_iterator<char>());

For just charCount, use myVector.resize() rather than reserve().

Trillian

Jul 27, 2007 at 10:23 AM

yay, thanks a lot SiCrane!

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