HELP PLEASE (Checking a int that contains a decimal point)

Hi all im trying to check a integer which must contain a decimal point is there any function which does this!!!

Example : 21.000

There is no desimals in integer... period:)

For decimals always use float

Code:

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float number;
number=21.1234;
cout<<number;

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Quote:

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For decimals always use float

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Oh yeah... I forgot that :D