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flat assembler > High Level Languages > what in c++ std::cin>>somethin; take?

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äüöu



Joined: 21 Apr 2014
Posts: 1
what in c++ std::cin>>somethin; take?
i have a qest for you:
find out what in c++
std::cin>>somethin;
take and why its a bit shift operator >>?

thanx y0u advice.
Post 21 Apr 2014, 18:25
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typedef



Joined: 25 Jul 2010
Posts: 2909
Location: 0x77760000
>> along with << are generally used for stream IO operations in C++ but they can also inherently be used for arithmetic operations.
Post 06 Oct 2014, 14:05
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AsmGuru62



Joined: 28 Jan 2004
Posts: 1377
Location: Toronto, Canada
I always found these (<< and >>) confusing.
I like how C# has a better solution.
C# has ToString() method at the very base of every class.
So, instead of ">>" the simple call "ToString()" can be used on any object.
Code is slightly longer on disk, but easier to read.
Post 06 Oct 2014, 14:39
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ManOfSteel



Joined: 02 Feb 2005
Posts: 1124
It's straightforward: << (AKA the insertion operator) and >> (AKA the extraction operator) show the direction taken by data, i.e. going to a stream or coming from a stream.


Code:
std::cout << "Hello World!";


writes the Hello World! string to the standard output (usually the screen).


Code:
std::cin >> inVar;


reads the contents of the standard input (usually the keyboard) into the inVar variable.

It all depends on the context. These operators become bitshift operators if the part on the left is an int or char variable.
Post 06 Oct 2014, 17:30
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