Thread: How do I get rid of "Warning : Constant is long in function main"

I am trying to get rid of the 117 warnings in the code I was given to modify. The warning I am working on now is shown by”

Code:

#include <stdio.h>
int main()
{
                long fpos;
                fpos= 1000001;
                if(fpos > 1000000)
                {
                                printf("fpos is bigger\n");
                }
                else
                {
                                printf("Smaller\n");
                }
                return(0);
}

When I build this code in the Borland C++ version 4.52 IDE configured for the 16 bit 80186 instruction set I get the following messages:

“Compiling TEST.CPP:
Warning TEST.CPP 8: Constant is long in function main()
Warning TEST.CPP 9: Constant is long in function main()
Linking test.exe:”

The program is doing what I expect but I want to get rid of the warning.

The help file says “Inline assembler numeric constants must be integers between -2,147,483,648 and 4,294,967,295, and they must start with one of the digits 0 through 9 or a $ character.”

So, how can I get rid of the warning?

I compiled it with gcc and -Wall and get nothing.
Mind that we use to write return 0; and not return (0); ,but this is not a problem.

Can you even use numbers that big on a 16bit machine?

Originally Posted by homer_3

Can you even use numbers that big on a 16bit machine?

You have a point C data types - Wikipedia, the free encyclopedia

Sure. It's up to the compiler to generate appropriate code to handle 32-bit numbers or more... It may take a few machine instructions to do it. We were able to do 32-bit integers on 8-bit micro processors no problem.

Thank you all for the inputs. I added the L suffix and the warning went away.
I want C code. The IDE picked the .CPP suffix for the source file name.
I will pay attention to this in the future.