Code::Blocks has Alzheimer's: "casting" warning

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  1. #1
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    Code::Blocks has Alzheimer's: "casting" warning

    Hello:

    I think my 'C' code is correct, but Code::Blocks warns with:

    "warning: cast from pointer to integer of different size"

    First, the data setups.

    Code:
    struct soughtstrings {
    char *sought_string;
    char sought_string_data[100];        /* typical string */
    int   bypass_sought_string;
    };
    
    struct programdata {
    int  some_int;
    long some_long;
    struct soughtstrings ss[50];      /* no big whoop here */
     };
    Inside function:

    Code:
    scan_strings()
    {
    int   i;
    struct programdata pd;      /* allocate the structure */
    ...
    ...
    ...
    for (i = 0; i < 49; i++)
      {
    
      pd.ss[i].sought_string_data[0] = (char) " ";    <<<WARNING HERE
    
      }
     }
    Since all this is at the scope of struct programdata, I see no need for pointer dereferencing. Warning again:

    warning: cast from pointer to integer of different size

    I don't see any "pointer to integer". Do you? Where? I simply want to insert a space in "sought_string_data[]" array position 0.

    Thanks!

  2. #2
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by gandsnut
    I don't see any "pointer to integer". Do you? Where?
    I see an array of 2 chars: " ". An array can be converted to a pointer to its first element.

    Anyway, what you should write is:
    Code:
    pd.ss[i].sought_string_data[0] = ' ';
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    My bad. Good catch. I need new glasses.... Thanks.

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