How can i handle invalid input to cin(cpp)

Asked Sep 28 '21 at 13:48

Active Sep 28 '21 at 13:48

Viewed 121 times

when i use the code below,

char command;
cin >> command;

i want to get only ('a','c','d') as inputs. In other alphabet(int) cases, i can solve the problem using 'switch statement'

But when someone types multiple characters, my program doesn't know what is the problem. Just, take one charcter of multiple characters.

In conclusion, I want to detect the multiple character input case. And this happens, i want to print error, then program to keep running.

asked Sep 28 '21 at 13:48

gun bos

2

You could use `std::getline` instead and process the logic depending on the string size – RoQuOTriX Sep 28 '21 at 13:50
read a string then parse the individual characters. Reading a string rarely fails – 463035818_is_not_an_ai Sep 28 '21 at 13:50
there are loads of questions and answers on how to validate user input. Did you try any? – 463035818_is_not_an_ai Sep 28 '21 at 13:51
Learning to program is also learning how to find information and teach yourself. For example: https://www.learncpp.com/cpp-tutorial/stdcin-and-handling-invalid-input/ – Pepijn Kramer Sep 28 '21 at 13:52

0 Answers0