Thread: Erro: Referenced in function _main

  1. #1
    Registered User
    Join Date
    Mar 2012

    Erro: Referenced in function _main

    I've been working on this program and every time I run it I get two errors that say:

    error LNK2019: unresolved external symbol _input_TempInfo referenced in function _main

    error LNK2019: unresolved external symbol _input_Num_TempInfo referenced in function _main

    Here's my code

    #include <stdio.h>
    #include <stdlib.h>
    struct TempInfo
        int day;
        double fahr; 
        double celsius;
    struct TempInfo input_TempInfo (void);
    void print_TempInfo (struct TempInfo);
    int input_Num_TempInfo (void);
    int main (void)
        struct TempInfo temparray[20];
        int i, numTempInfo;
        numTempInfo = input_Num_TempInfo();
        printf ("Entering the %i temperature info \n", numTempInfo);
        for (i = 0; i < numTempInfo; i++)
            temparray [i] = input_TempInfo();
        return 0;
    struct TempInfo input_Tempinfo (void)
        struct TempInfo hold;
        printf ("\nEnter in the day (1-366): ");
        scanf ("%i", &;
        while (( < 1) || ( > 366))
            printf ("\nDay is out of range, please re-enter: ");
            scanf ("%i", &;
        printf ("Enter in the fahrenheit temperature");
        scanf ("%lf", &hold.fahr);
        hold.celsius = (hold.fahr - 32) * 5/9 ;
        return hold;
    Any feedback would be great

  2. #2
    Registered User
    Join Date
    Jan 2009
    Well, where is your implementation of input_Num_TempInfo()? You declare it and use it, but there is no implementation in the code you posted.

    Edit: The other issue is related to spelling, you declare your function like this input_TempInfo, but the implementation is spelled like this: input_Tempinfo.
    Last edited by Subsonics; 04-14-2012 at 01:22 PM.

  3. #3
    - - - - - - - - oogabooga's Avatar
    Join Date
    Jan 2008
    You don't have an implementation of input_TempInfo either. Check the spelling and case carefully.
    The cost of software maintenance increases with the square of the programmer's creativity. - Robert D. Bliss

  4. #4
    Registered User
    Join Date
    Jun 2010
    Michigan, USA
    Edit: Already covered.
    Last edited by pheininger; 04-14-2012 at 01:32 PM. Reason: Already covered.

  5. #5
    Registered User
    Join Date
    Mar 2012
    Thanks for taking a look at my code. It runs like a champ now!

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