User input type validation

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C++

Hi all,
I need a C++ code snippet to validate values entered by user to be of type int. I know that the visual studio compiler will use the ASCII equivalent for a char if the user enters characters but I do not want the input to be characters or any other type. The algorithm for the code is something like:
if (input == integer)
accept;
else
reject;
The problem I have presently is that a value and a type cannot be tested for equality.