How to convert an integer to double?

Hey guys,

I'm beginner, Can please someone tell me how to convert an integer into double.

Another general question: Can someone give me a link where i can find all the useful methods (library methods). For example, for java we can find all the different classes and methods on sun site. I found out that the online tutorials are not that helpful.

I would really aperciate the help . Please someone? Thanks in advance!!

Assume the following decleration for each example:

Code:

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int number;

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Here are a couple of ways...

Code:

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double(number);

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Code:

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static_cast<double>(number);

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Thanks Josh ... It worked

Quote:

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Originally Posted by JoshR

Code:

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double(number);

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You mean of course

Code:

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(double)number;

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double(number) also works - it uses a constructor, from what I understand.

No need for a cast at all, the conversion is implicit. Just assign the int to the double.

Quote:

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Originally Posted by laserlight

double(number) also works - it uses a constructor, from what I understand.

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In C, only (double)value works, but the double(value) syntax became legal in C++ to allow primitive casting to appear like a function call. (No, it's not a constructor.)

Quote:

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Originally Posted by Daved

No need for a cast at all, the conversion is implicit. Just assign the int to the double.

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Who said he was assigning it to something? maybe he wanted to do calculations with it and print it.

I was originally taught to use double(number), then I found out about other ways and now either use static_cast<double>(number) or (double)number...

and for your reference: http://www.cppreference.com

be warned though: there are alot of non-standard functions floating around in the world of C/C++ (mostly because it's not platform-independent, like Java), and that site only provies standard methods (ones should work on any (popular) platform).