newbie question regarding user input

This is a discussion on newbie question regarding user input within the C Programming forums, part of the General Programming Boards category; Hi all, I'm writing a program to calculate the average of 10 integer numbers (which is easy). I have to ...

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    Registered User cantore's Avatar
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    newbie question regarding user input

    Hi all, I'm writing a program to calculate the average of 10 integer numbers (which is easy). I have to use an array to store all 10 integers (easy again) but the issue that I'm having is that if the user enters any letter the program should calculate the average at that point. In other words if the user enters 5 integers and then enters a letter the program should calculate the average of those 5 integers and end.

    What kind of "if" statement should I write? The array that holds the user's input is int values[10]. I'm trying to use this if statement but I get garbage output:

    if (values[i]=='x') {store the value of i and proceed to find the average}

    And that's after using a loop with index i. Again, the issue Im having is telling the computer to stop after the user enters a letter.

    Any help would be appreciated, thanks.

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    Frequently Quite Prolix dwks's Avatar
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    Check the return value of scanf().

    http://faq.cprogramming.com/cgi-bin/...&id=1043284385
    dwk

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    read up on functions like issalpha() and then implement in an if statement.

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    cwr
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    Quote Originally Posted by cantore
    What kind of "if" statement should I write? The array that holds the user's input is int values[10]. I'm trying to use this if statement but I get garbage output:
    Code:
    if (values[i]=='x') {store the value of i and proceed to find the average}
    If you are reading in values as ints, you cannot expect to handle a character inputted. scanf will just stop at that point, leaving it on the stream for another call, because it can't convert it in the manner that you requested.

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    Registered User cantore's Avatar
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    After reading some of the stuff in that link and the suggestions here I got it to work. Thanks guys.

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