🚀 go-pugleaf

In article <5633@uwm.edu> peter@csd4.csd.uwm.edu (Peter J Diaz de Leon) writes:
>I am having problems with the following simple piece of code.
>When reg1 is an unsigned int mode prints out correctly.
>When reg1 is an unsigned long int mode prints out 
>incorrect results. I have tried both Turbo C 2.0
>and Turbo C++ 1.0 and get the strange results. 
>Can somebody please explane to me what I am
>over looking.
>
>I am running on a Compaq Deskpro 286 using 
>4dos ver:3.01a and DOS ver:3.31
>
>	Thanks
>	-Peter
>	peter@csd4.csd.uwm.edu
>	peter@cvax.cs.uwm.edu
>
>=============================================================================
>
>#include <stdio.h>
>#define ME 0x12
>
>test(reg1, mode)
>unsigned long reg1;
>int mode;
>{
>    printf("TEST: mode=0x%x \n", mode);
>    return;
>}
>
>
>main()
>{
>    test(0x1, ME);
>    return;
>}


Ah yes, the infamous incompatible arguments problem. On most PC compilers,
long and ints are not the same size. (int 16 bits, longs 32 bits). By default,
constants are interpreted as ints. You are therefore attempting to pass an int
argument to a function that expects a long.

To fix it, you must do one of two things..

1.) Typecast to a long, for a constant, this is not the best practice.

2.) Specify the constant as being long by appending 'l' to it. ie


	test(0x1l,ME);


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