Repeat specific cout until it is true.

[kevwinpal]

The variable/data type is a string named UN.
I would like to repeat the same cout statement while the cin is not equal to my liking.

Example:
cout<<"Ketchup:";
cin>> UN;
if(UN=="potatoes");cout<<"fries";

but if potatoes is not entered, then I would like to cout<<" ketchup"; forever until it is finally entered correctly.

I would like to output "ketchup" as long as the input is not equal to my desired cin>> which is potatoes. And then when cin>> is potatoes I would like to move on to a new cout statement such as cout<<"Mustard:";

I have tried if and else conditions. I have tried the while loop and it kept repeating without stopping.

Please just give me hints, as I want to figure this out with minimal help.

Thank you in advance.

KP

[Ben Duncan]

if's and else's probably won't help you here, though that while loop could have worked.

(Keep trying with a while loop at the moment, and come back if you need some more help.)

[kevwinpal]

Heres what I have:

#include <iostream>
#include<string>
using namespace std;
string UN;

int main()
{
cout<< "Ketchup:";
cin>> UN;
while (UN!="potatoes");{cout<<"Ketchup:";}
}

When I run this and dont enter potatoes, it returns a blinking cursor.

When I run this and enter potatoes it returns ketchup, even though I told it not to.

Do I need to add a new cin>> after the last cout<<?
Should I add another while loop while(UN=="potatoes"; and then have a cout<< for that??

[Ben Duncan]

I don't think you're quite getting the concept of while loops.

This is how they work:

while(something)
{
    While something is true, do this.
}

Putting a while after your code won't work... Keep trying though.

Also, please use [ code] [ /code] tags

[WR417H]

I would use a do while loop like this:

int main()
{
	do 
	{
		cout << ketchup;
		cin >> UN;
	} while(UN != "potatoes");           
}

And the reason u get Ketchup repeated forever in

int main()
{
cout<< "Ketchup:";
cin>> UN;
while (UN!="potatoes");{cout<<"Ketchup:";}
}

is because you say "while UN does not equal potatoes, print ketchup."
So, if you don't give the user a chance for input to change UN's status or break
from it, then you get the infinite loop.

[kevwinpal]

Thank you Ben Duncan and WR417H!!!

The devil is in the details! My {} were in the wrong places and that is indeed why I received the infinite loop. I was including while within the {}. The infinite loop was occurring in combo with an if condition also.

Always learning!

KP