Mac Forum / Programming / Mac Programming / February 2010

I am having trouble as a C beginning trying to compile the code below
using XCode.  I am new to C and have always programmed in pascal in
the past. This is to be a plugin for 4th Dimension.  Most of the hooks
were generated with "4D Plugin Wizard".  It generates the C code for
the plugin to be used by XCode.  I think most of my errors are simple
declaration problems or problems with the C language.  I am getting
the following errors:

error: parse error before "int"
error: parse error before "char"
error: parse error before '+' token
error: subscripted value is neither array nor pointer

The code follows:

/*
--------------------------------------------------------------------------------
#
#    4DPlugin.c
#    source generated by 4D Plugin Wizard
#    Project : new Project
#    author : subaru
#    1/29/10
#
# This plugin should recieve two variable from the main 4D program.
#
# The first variable from 4D --------------
# One will be an array of length 54 composed of
# characters (0-9 and A-Z).  Each element represents a schedule day.
Each character in the element represents a
# 10 minute block of time in the schedule.  When the character is 0
(zero) there is nothing scheduled for that time.
# The difficulty of the the 10 minute time block increases as the
ascii value of the character that represents it
# increases in value from 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,..... etc.
#
# The second variable from 4D --------------
# This variable will be an integer value that represents the
difficulty of the new appointment.
# This value should be subtracted from the ascii value of the
character that represents each 10 minute
# time block.  The harder the new appointment the smaller the value
of the variable for the difficulty.
#
--------------------------------------------------------------------------------
*/

// -------------------------------- schedule Plugin
-------------------------------

void s_Convert_Array( PA_PluginParameters params )
{

    PA_Variable DayArray; //an array of characters of length 54 from 4d
    short Difficulty;  //an interger denoting difficulty of an
appointment
    PA_Variable FinishedArray;  // completed array returned to 4D
    char returnValue[256];

    DayArray = PA_GetVariableParameter( params, 1 );
    Difficulty = PA_GetShortParameter( params, 2 );

    // --- write the code of s_Convert_Array here...

{
int counter = 0;
int array_size = sizeof(DayArray);
int Day_Difficulty_AsciiValue; //used to hold one character
int slot_number;
char slot_char;

while (counter < array_size)  //array_size should be the number of
elements of array DayArray
{
    counter++;

    int counter2 = 0;
    while (counter2 < 55)  //stepping through each character of DayArray
    {
        counter2++;

//ERROR BELOW (error before "int")
        Day_Difficulty_AsciiValue =int(DayArray[counter2]);  // function to
convert a char in array to ascii value
        if (Day_Difficulty_AsciiValue>=65) // is character a letter
            slot_number = Day_Difficulty_AsciiValue-7-48;
        else //character is a number
            slot_number = Day_Difficulty_AsciiValue-48;

        slot_number = slot_number - Day_Difficulty_AsciiValue;

        if(slot_number<0)
            slot_number = 0;

// convert the number to the characters 0-1,A-Z
// 48 is the number of ascii values before the numbers begin
// 7 is the numbere of unused ascii values between the numbers and
capital letters

        if(slot_number>=10) //number will be converted to a character
//ERROR BELOW  (error before "char") (error before '+' token)
            slot_char = char(slot_number+48+7);
        else  // this will be a number
            slot_char = char(slot_number+48);

//ERROR BELOW    (subscripted value is neither array nor pointer)
        FinishedArray[counter2] = slot_char;  // store the character back
into the original array to be passed to 4D
    }

}

}

    PA_SetVariableParameter( params, 3, FinishedArray, 1 );
    PA_ReturnString( params, returnValue );
}