How do I trap integer inputs in C++?

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This is just a portion of my program and I want to trap the integer inputs using while loop.

C#

cout<<"\nEnter the name : ";
while(/*while input is integer or not in character*/)
{
   //Display invalid Input!
}
cin.ignore();
cin.getline(name, 100);

Posted 7-Oct-14 10:34am

GwapoKho

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Richard MacCutchan 7-Oct-14 16:43pm

Then you need to read some input and test to see if it is an integer. You could try reading it by single character, or read a complete line and then do a test on all the characters in the line.

Sergey Alexandrovich Kryukov 7-Oct-14 18:34pm

What do you want to achieve, exactly?
If you request for name, not only digits can be wrong. You would need to block many other characters, such as '$' (in most names :-)...
—SA

[no name] 7-Oct-14 18:39pm

Do you really think that asking the same question over and over is going to help?

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-10-07T12:51:00

Solution 1

It looks like you need to allow only alphabet input. Then the check you need for validation would be isalpha:
http://www.cplusplus.com/reference/locale/isalpha[^].

—SA

Posted 7-Oct-14 12:51pm

Sergey Alexandrovich Kryukov