incompatible types

[cmorpad]

Hello,

I need help with this issue,

What's this error message caused for? I've tried several times to compile a simple program but have no idea of how to solve it.

* [readnum.mod 12.07 E029]
* incompatible types:
    "INT32"
    "PROCEDURE [Modula] (IOChan.ChanId,VAR INT32)"
  Num $:= ReadInt;

Thank you

[johng]

You asked about:

Code:

Num $:= ReadInt;

First clue: What is the definition of ReadInt?

[cmorpad]

Here you are, these are the declarations I included.

      1 MODULE readnum;
      2
      3 FROM InOut IMPORT WriteString,WriteLn,WriteInt;
      4 FROM WholeIO IMPORT ReadInt;
      5 IMPORT SYSTEM;
      6
      7 VAR
      8         Num     : INTEGER;


Thank you

[cfbsoftware]

  Num $:= ReadInt;

If you look at the Help file you will see that ReadInt is defined as a procedure which returns a value via a VAR parameter not as a function result. There are two possible uses:

  PROCEDURE ReadInt (cid: IOChan.ChanId; VAR int: INTEGER);
  PROCEDURE ReadInt (VAR int: INTEGER);

Thus you should write something like:

ReadInt(Num);

[johng]

Further to Chris' reply, you should always examine the definition of the function in the "DEF" file.  It tells you how to call it and what it returns.