output running nonstop

[newlearner]

When my program prompt the user to enter numbers it will perform the calculation.

but when user enter it with characters (e.g a or b) the output will run nonstop....is there any way to stop this from happening?

[hamsterman]

See http://cplusplus.com/articles/S3wTURfi/

[newlearner]

im using the cin to get the input....how im gonna do that?

[hamsterman]

Did you read the article at all? It gives you the code to validate your input. That's exactly want you need..

[eypros]

I would also suggest that you can read your input as string, check if it's number and then convert it to one, but I think that the proposed article is better solution (and more c++-styled)