Multiple Inputs

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Multiple Inputs

 
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  #1
Nov 1st, 2009
I know this is probably a really easy question, but my teacher failed to mention how to do it, so here goes.

I'm making a simple program that tells a user if a sequence of given numbers are even or odd. Here's what the program should look like:

C++ Syntax (Toggle Plain Text) 
  1. Enter a sequence of numbers (0 to quit): 12 4 19 3 0
  2.  
  3. 12 is even
  4. 4 is even
  5. 19 is odd
  6. 3 is odd

I've gotten the program made, except my output stops at "12 is even".
My question is, how do I get my program to loop through all of the numbers and stop at 0?
I tried using a while loop,
C++ Syntax (Toggle Plain Text) 
  1. while (x != 0)
But, it just looped "12 is even" over and over.
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  #2
Nov 1st, 2009
Post the rest of the code. That seems like it should be working to me.
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  #3
Nov 1st, 2009
Here's my code.

C++ Syntax (Toggle Plain Text) 
  1. int main ()
  2. {
  3.    int input;
  4.    cout <<"Enter a sequence of numbers (0 to quit): ";
  5.    cin >> x;
  6.  
  7.    if (x != 0)
  8.    {
  9.      if (x % 2 == 0)
  10.       {
  11.          cout << x << " is even" << endl;
  12.       }
  13.       else if (x % 2 != 0)
  14.       {
  15.          cout << x << " isn't even" << endl;
  16.  
  17.       }
  18.   }
  19. }
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  #4
Nov 1st, 2009
Ok your code has a few problems with it. First put this at the top of the code
C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. using namespace std;
Next change you variable input to x. This is the variable that will be entered by the user and tested by the if statement.
Next xhange the first if to a while loop and move cin>>x into the while loop.
Then use your current if/else to test the input.
Finally put return 0; before the final right brace }
Your main problem was leaving cin>>x outside of the while loop. You need it in the loop so you can enter many numbers.
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1
  #5
Nov 1st, 2009
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Originally Posted by Towely View Post
Here's my code.

C++ Syntax (Toggle Plain Text) 
  1. int main ()
  2. {
  3.    int input;
  4.    cout <<"Enter a sequence of numbers (0 to quit): ";
  5.    cin >> x;
  6.  
  7.    if (x != 0)
  8.    {
  9.      if (x % 2 == 0)
  10.       {
  11.          cout << x << " is even" << endl;
  12.       }
  13.       else if (x % 2 != 0)
  14.       {
  15.          cout << x << " isn't even" << endl;
  16.  
  17.       }
  18.   }
  19. }
Your almost there :

1) change : int input; TO int x;
2) Wrap your code in a do while loop.
C++ Syntax (Toggle Plain Text) 
  1. int x = -1;
  2. do
  3. {
  4.   /* get user input and check for even/oddity */
  5. }while(x != 0) //quits if user enters 0
1) Prove that the area of a circle is pi*r^2, where "r" is the radius of the circle.
2) Problem 2[b]solved by : jonsca
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0
  #6
Nov 1st, 2009
Thank you very much! The Do...While loop worked like a charm.
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