IS there anyway i can test or check if a user enters a certain data type...?

[anon2343]

wondering if there's a way i can test if.... a user enters a certain <data type>... to execute some code(i.e function calling,print something..ask for some other input..ect.).


???can you show me if there's something like this.
in c++

example ...say if a user enters char or float input...... call this function.




thanks in advance.

[tummychow]

There's an article by zaita in the articles forum on managing user input using cin. What I'd imagine is that you'd get a string, and then determine what the input is based on its length, contents, etc. If it was all digits except one period, you could assign it to a double. All digits with no period is an int. A single character, not a digit, would be a char (but so could a single digit, which is why you'd need more information than user input alone). Anything else... string, I guess.
You can't get an "indeterminate" data type, if that's what you had in mind.

[Seraphimsan]

or just use the isdigit(), isalpha() functions. I love this functions, they do wonders for simple expression parsers.