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help with simple functions

Discussion in 'C' started by buzz271, Sep 6, 2010.

  1. buzz271

    buzz271 New Member

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    Does anyone see anything wrong with these simple functions?

    Basically, the "get_field" gets a word from the file of unknown length and "add_char" will add the character to the string.

    The problem lies somewhere in the "add_char" function because the memory is never realloc'd. I don't get any error messages--the word is just blank when printed. :-(

    Code:
    char *add_char(char *string,char character)
    {
        char *tmp=realloc(string,sizeof(string)+sizeof(char));
        if(tmp!=NULL)
        {
            string=tmp;
        }
        string[sizeof(string)/sizeof(char)]=character;
        return string;
    }
    
    char *get_field(FILE *inputfile)
    {
        char character;
        char *field;
        
        field=(char*)malloc(sizeof(char)*2);
        
        do
        {
            character=getc(inputfile);
            field=add_char(field,character);
        }
        while(character!='\0');
        
        field[sizeof(field)]='\0';
        
        return field;
    }
     

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