while loop problem

This is a discussion on while loop problem within the C Programming forums, part of the General Programming Boards category; Hi, I'm working onn an assignment and I'm stuck! Maybe it's because I'm still new at programming but I can't ...

  1. #1
    Registered User
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    Oct 2008
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    3

    Unhappy while loop problem

    Hi,
    I'm working onn an assignment and I'm stuck! Maybe it's because I'm still new at programming but I can't get my program to exit after you enter 'N' for no when the user is asked "Do you want to try again?", it just starts over as if I had typed in 'Y'.
    Also can someone tell me if it's possible to empty the memory so that the coins don't add up after each try?
    Any help would be great I've spent hours trying to fix this on my own!
    thanks,
    here is the relavent code.
    Code:
    while(ch='Y'){
             
                      
        printf("\n Your total is $", amount);
        scanf(" %f", &amount);
        
        change=(5.00-amount);
       
        while(change>=0 && change<=500){
    .....(enclosed while statements, I checked the curly brackets!)
    
    // print results
           printf(" You have %d coins of 2 dollars \n", toonie);
           printf(" You have %d coins of 1 dollar \n", dollar);
           printf(" You have %d coins of 25 cents \n", quarter);
           printf(" You have %d coins of 10 cents \n", dime);
           printf(" You have %d coins of 5 cents \n", nickel);
           printf(" You have %d coins of 1 cent \n", cent);
           break;
            
          {
           printf("\n Do you want to try again? (Y/N)\n");
           ch=toupper(getche());
            printf("\n");
             
           } getch();
           }
    I tried and tried to fix it without result.

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    14,185
    ch='Y' does not compare ch to the letter 'Y'. (It does, however, assign the letter 'Y' to ch.)

  3. #3
    spurious conceit MK27's Avatar
    Join Date
    Jul 2008
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    segmentation fault
    Posts
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    Amazingly, I still have this in big red marker above my function keys:

    ==

    it looks very ichingish here, probably something about an existing balance
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  4. #4
    Registered User
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    For your first line, try:

    Code:
    while (ch == 'Y')
    {
       ...
    }
    Alternatively you could use:

    Code:
    do
    {
       ...
    }
    while ((ch = toupper(getche())) == 'Y');

  5. #5
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    thank you

  6. #6
    Banned master5001's Avatar
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    Visalia, CA, USA
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    I mentioned this type of error here

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