C++ Programming

This is a discussion on C++ Programming within the C++ Programming forums, part of the General Programming Boards category; How do I check for a blank entry for numerical input in a C++ program? For example, if my input ...

  1. #1
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    C++ Programming

    How do I check for a blank entry for numerical input in a C++ program? For example, if my input variable is Qty (an int), how do I check to see if the user simply presses Enter without keying in a value for Qty?

  2. #2
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    when you use CIN the program will wait for a value to be entered.

  3. #3
    Skunkmeister Stoned_Coder's Avatar
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    When obtaining input from the user it is often best to get the input as a string and then parse it. If you need numerical input then have a look at atoi() which will transform a string to a number.
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

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