|Written by Antoni Boucher|
|Thursday, 23 June 2011|
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Are you always speaking the same syntax as your compiler? This C++ puzzle looks at how you can put things together thinking they mean one thing when in fact they mean another...
Sometimes, we initialize a vector using iterators. But we can get unexpected behavior or a compiler error.
Does the compiler always understand the code the same way we do?
This Programmer Puzzle explores how C++ compilers interpret vector initialisation with iterators.
Here is a simple way to get words from the user and push them into a vector:
This works perfectlhy and as you would expect.
For example, if you want to show the first word:
std::cout << data.at(0) << std::endl;
The first word entered by the user is shown on the screen, as expected.
But, perhaps you find this way of working a bit long and you decide to try a "better" way of getting words from the user.
So you try the same task but with iterators:
Now you run the program and it doesn't ask you to enter any thing at all. No error messages - just nothing.
It is supposed to do the same thing.
What is going on?
Go to the next page to see the answer.
|Last Updated ( Friday, 05 August 2011 )|