fgets && sscanf

This is a discussion on fgets && sscanf within the C Programming forums, part of the General Programming Boards category; code: struct Base { float Tocke; struct Base *next; }; // this code is in the function float Points1; printf("Enter ...

  1. #1
    Code Warrior
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    Nov 2001
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    fgets && sscanf

    code:

    struct Base
    {
    float Tocke;
    struct Base *next;
    };

    // this code is in the function

    float Points1;

    printf("Enter points: ");
    fgets(Points1, strlen(Points1), stdin);
    sscanf(Points1, "%f", (*NEW)->Points);

    Could anyone tell me why this code is not working?
    Current projects:
    1) User Interface Development Kit (C++)
    2) HTML SDK (C++)
    3) Classes (C++)
    4) INI Editor (Delphi)

  2. #2
    Registered User C_Coder's Avatar
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    fgest reads a string so you need a tempary character array

    Code:
    char temp[MAX];  /* MAX size of input */
    float Points1;
    
    printf("Enter points: ");
    fgets(temp, sizeof(temp)-1, stdin);
    sscanf(temp, "%f", &Points);
    you also need to read sizeof - 1 as fgets leaves the newline on the string and adds the NULL to the end, so you array needs to have an extra element
    All spelling mistakes, syntatical errors and stupid comments are intentional.

  3. #3
    Code Warrior
    Join Date
    Nov 2001
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    This is working. But if I do this with pointers than it is not working. How to do it with pointers?
    Current projects:
    1) User Interface Development Kit (C++)
    2) HTML SDK (C++)
    3) Classes (C++)
    4) INI Editor (Delphi)

  4. #4
    Registered User C_Coder's Avatar
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    When you use the structure pointer in the sscanf you have to use the & in front of it.
    Code:
    sscanf(temp, "%f", &struct_PTR->Points);
    That should work, it does for me.
    All spelling mistakes, syntatical errors and stupid comments are intentional.

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