C++ loop to verify user input

Question

Hey guys,

i am just learning C++ and in tried to check, if a user input meets multiple conditions.

So i store two integers (user input) in two different variables, for example „weeks“ and „days“.

now i want to take a new user input, if weeks<0 OR days<0 OR days>6, but i have no idea how this works…

If i write:

if (weeks<0)
{
cout<<„false“<<endl;
cin>>weeks>>days;
}

It Prints the text, but i cant take a new input…

Answer 1

i like the do... while loop here. when checking 2 different variables, you should also use 2 of these loops.

'||' is the logical 'OR' operator

Answer 2

Felix L ,

you can find things like this in the community section by using the search bar. here is a short tutorial about logical operators:

https://www.sololearn.com/learn/CPlusPlus/1619/?ref=app

Answer 3

Can you post the full code? You may just need to give all inputs at once

Answer 4

Try a while condition that every time your condition is true, which means false input, loop you back to your input

Answer 5

Yeah i thought about a while condition, but how can i put multiple conditions in one while loop?

Answer 6

You should also wrap the input int a try catch. This will allow you to control your exceptions. For example:

do{
try{
cin>>number;
if(!cin)
} catch (...){
cout << "User input error" << endl;
}

Phone is dieing. Good luck

Answer 7

Okay, i will try this… does || mean „and“?

Answer 8

AND operator is && and OR ||

Answer 9

https://www.cplusplus.com/doc/tutorial/operators/ this may help you

Answer 10

basically to compliment the other comments, it will not be as simple as a for loop; typically you eould use an object or static class to handle the process.
There are functions and so in the standard library that could be useful, though

Answer 11

Okay, and just to understand it better, what is the logical AND operator?