Check if the input is a number or string in C++

Question

I wrote the following code to check whether the input(answer3) is a number or string, if it is not a number it should return \"Enter Numbers Only\" but it returns the same e

Answer 1

The input to isdigit is an integer value. However, it will return true (non-zero) only if the value corresponds to '0'-'9'. If you convert them to integer values, they are 48-57. For all other values, isdigit will return false (zero).

You can check whether you got an integer by changing checking logic:

if ( cin.fail() )
{
   cout<<"Correct"<