C coding help for finding the weather... NOOB

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  1. #1
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    C coding help for finding the weather... NOOB

    For a uni project im am trying to write a program in c that will connect to the internet and find out what the weather is. if this goes to plan i will then make it so the desktop background changes depending on the weather. ambitious i know for some1 thats picking up the basics atm.

    can someone send me in the right direction about how id go about doing this, would i have to connect to rss feeds to check the weather?

  2. #2
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    u have to find the right website then you have to use either winsock or winnet to access it

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    Quote Originally Posted by philmagrill View Post
    For a uni project im am trying to write a program in c that will connect to the internet and find out what the weather is. if this goes to plan i will then make it so the desktop background changes depending on the weather. ambitious i know for some1 thats picking up the basics atm.

    can someone send me in the right direction about how id go about doing this, would i have to connect to rss feeds to check the weather?
    Why do something like that in C? It would probably be easier to program in Java or C#, which have library classes for connecting to websites, parsing html/xml content and interfacing with the WindowsAPI.
    C on the other hand has none of that.

    QuantumPete
    "No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
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    Doesn't libcurl do a lot of that.

    --
    Mats
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    Please don't PM me for help - and no, I don't do help over instant messengers.

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    Yeh C# makes sense but annoyingly I have to write it in C for the module. Libcurl looks interesting, will investigate cheers.

    philmagrill

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    Lightbulb Help parsing

    Update: so far i have managed to connect to the internet and DL the bbc rss feed to the file, which i can then open up. I have almost managed to get it to edit the registry to change the desktop background.

    Atm i am try to parse the file to extract the word sunny form the XML line

    Code:
    int main(void)
    {
    char word[128];
    char *p, prefix;
    int i;
    char string[] = "<title>Saturday: sunny, Max Temp: 16&#xB0;C (61&#xB0;F), Min Temp: 4&#xB0;C (39&#xB0;F)</title>";
    
    prefix = ',';
    
    p = strchr(string, prefix);
    
    if(p == NULL) {
    printf("No %c found.\n", prefix);
    }
    else {
    i = p-string;
    //printf("Found %c at position: %d\n", prefix, i+1);
    strncpy(word, &string[0], i);
    word[i] = '\0';
    printf("Weather is: [%s]\n", word);
    }
    return 0;
    
    }
    I have managed to get it to extract everything before the comma

    insert [code]
    eg Weather is: <title>Saturday: sunny
    [\code]
    How do i get it to parse the ":" and just leave the word sunny

    (also i have just manually written in the string, how would i get it to find that line in a big XML file, would i have to parse the whole file? or can i somehow select that line no. or something?)

    Thank you

    Phil

  7. #7
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    What about having the strings you want, in a 2D char array:

    rainy, sunny, cloudy, etc.
    [0], [1] [2], etc.


    Then take your feed into a very large char array and in a loop, strstr() through the page (in the very large char array, until they find the position of the first letter of the first target word that they find.

    That would eliminate the need to parse, anything.

  8. #8
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    [offtopic]
    How about point a webcam out the window and get images from that?
    [/offtopic]

  9. #9
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    Quote Originally Posted by cyberfish View Post
    [offtopic]
    How about point a webcam out the window and get images from that?
    [/offtopic]
    hahahah XD

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